How should the numbers be read?

Does an ISO 20743 activity value directly state the proportion destroyed?

ISO 20743 is a contact test on fabric, and its activity value is a difference against a control.

It is not an absolute count of anything destroyed, and it is not an airborne result. The textile and mask records under that standard are these. Hong Kong Metropolitan University (formerly The Open University of Hong Kong), Test Report IRITS2020007130001R3, 7 June 2021, tested a textile under BS EN ISO 20743:2013. Hong Kong Metropolitan University (formerly The Open University of Hong Kong), Test Report IRITS202203250001, 25 March 2022, tested a material under BS EN ISO 20743:2013. Hong Kong Metropolitan University (formerly The Open University of Hong Kong), Test Report 20220907001, 7 September 2022, tested a sample under BS EN ISO 20743:2013. The filter-medium record is this. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Under the ISO 20743 absorption method, 24 hours, that report records an antibacterial activity value A = 6.4 for Staphylococcus aureus and A = 4.4 for Klebsiella pneumoniae; ISO 20743 Annex F reads “Heavy: A ≥ 3”. An activity value is a difference against a control fabric. It is not a percentage destroyed and not an airborne result. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. A result on one of those articles is not a result for another, and a contact result on fabric is not a capture result for a panel air filter in a duct.

Confidentiality obligations may apply to a given report. A copy may be made available on our review of the request.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; Hong Kong Metropolitan University, Test Report IRITS2020007130001R3, 7 June 2021; Hong Kong Metropolitan University, Test Report IRITS202203250001, 25 March 2022; Hong Kong Metropolitan University, Test Report 20220907001, 7 September 2022; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

What denominator, comparison and exposure conditions sit behind the stated percentage?

The stated percentage is the Validation page's “up to 99.99%” for a broad spectrum of viruses, bacteria and fungal spores, given with the pathogens, conditions and institutes the page lists; the denominator, the comparison and the exposure conditions of each result are in the report that recorded it, for the article that report tested.

What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard. The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, a laboratory accredited to ISO/IEC 17025, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

How do detection limits, non-detects and uncertainty affect the stated performance result?

Detection limits, non-detects and uncertainty are read from the report that recorded the result, and the company's pages do not restate them.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

What statistical support exists for generalizing the reported result beyond the tested samples?

A result covers the samples it was measured on. What the published record holds for each test is the report itself, with the laboratory that ran it, the article it was tested on and the standard it followed.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), a testing laboratory accredited according to ČSN EN ISO/IEC 17025:2018 by the Czech Accreditation Institute, Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no statistical basis for generalising a result beyond the samples tested, because each result belongs to the report that recorded it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Are repeated measures on one sample being distinguished from independent samples in the evidence summary?

A result covers the samples it was measured on, and each result stays with the report and the samples it came from.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), a testing laboratory accredited according to ČSN EN ISO/IEC 17025:2018 by the Czech Accreditation Institute, Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no evidence summary of its own, because each result belongs to the report that recorded it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Has the charge-retention calculation in the legal-position record been reconciled with the original measurements?

The company's two statements carry no efficacy calculation, and each says so in its own words.

The Statement of Classification states at 1.3 that it addresses the classification question only and that it states no efficacy data, and the Statement of Regulatory Status states the same at 1.3. What those documents record about the charge is how it is measured. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The NanoFlashing manufacturing process produces the charge. The process acts on the filter by physical means. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 1.3, 2.2 and 2.3, issued by NF Technical Products Inc.; Statement of Regulatory Status for the NanoFlashing™ Air Filter, sections 1.3, 2.2 and 2.3, C-POLAR Technologies, Inc., 11 September 2026.

Reviewed on 21 September 2026.

Is the headline percentage an average, a median or the best observed result?

The headline figure is the Validation page's “up to 99.99%”; the words “up to” are part of it, the page does not present it as an average or a median, and each result behind it is in the report that recorded it, for the article that report tested.

What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard. The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011, and a rating belongs to the filter that was tested and to the conditions in the report. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Does the reported value combine different target types into one number?

The Validation page's “up to 99.99%” is one statement covering a broad spectrum of viruses, bacteria and fungal spores; each numbered report gives its own value for its own organism, standard and article.

What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard. The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011, and a rating belongs to the filter that was tested and to the conditions in the report. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Are confidence intervals available for each reported result?

A confidence interval is read from the report that states it, and the company's pages do not restate one.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Was uncertainty propagated through the calculation of percentage reduction?

How uncertainty was handled is recorded in the report that states the result, and the company's pages do not restate it.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

How are zero-valued measurements represented in a logarithmic result?

The results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it, and the company does not restate how a laboratory recorded a zero count in a logarithmic result.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Does rounding make the public percentage look more precise than the data support?

The public figure is the Validation page's “up to 99.99%”, and the words “up to” are part of it; the precision and the rounding of each result are those of the report that recorded it, for the article that report tested.

What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard. The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011, and a rating belongs to the filter that was tested and to the conditions in the report. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Can a result stated to four decimal places be justified by the measurement precision?

The public figure is the Validation page's “up to 99.99%”, and the words “up to” are part of it; the precision and the rounding of each result are those of the report that recorded it, for the article that report tested.

What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard. The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011, and a rating belongs to the filter that was tested and to the conditions in the report. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Were multiple comparisons accounted for when selecting a statistically significant finding?

A comparison a laboratory made belongs to the report that records it, and the company's pages do not restate it.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Is the size of the effect practically meaningful even if it is statistically significant?

An effect size is read from the report that states it, and a laboratory result describes that test only, not a benefit in use.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Could a small study fail to detect a meaningful difference between products?

A result covers the samples it was measured on. What a test found on the samples named in it is what its report states.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

This site publishes no power analysis for any study; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Does the analysis treat multiple measurements from the same lot as independent evidence?

A result covers the samples it was measured on. Each report stands for the samples named in it.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no analysis that combines measurements from one lot; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Are results weighted by sample size when studies are combined?

A result covers the samples it was measured on. The reports named here are cited one by one, each for the test it records.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no combined analysis of studies, so it applies no weighting; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Does a pooled figure hide a poorly performing product variant?

A result covers the samples it was measured on. Each report is named with the article it was run on.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no pooled analysis across product variants; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Were outliers removed symmetrically from treated and comparison groups?

How a laboratory handled its data, outliers included, is recorded in the report that states the result, and the company's pages do not restate it.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

How sensitive is the conclusion to the handling of missing values?

The handling of a missing value is recorded in the report that states the result, and the company's pages do not restate it.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Is variability between manufacturing lots included in the uncertainty estimate?

A result covers the samples it was measured on. The measurement that is repeated from run to run is the charge.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no uncertainty estimate across manufacturing lots; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Does the graph start at a value that visually exaggerates the difference?

The page publishes the chart's own measurements as a table, point for point, so the drawing can be checked against the numbers it was made from.

The NanoFlashing page carries a chart of filtration efficiency against particle size, and beneath it the same measurements in a table, at eleven particle sizes from 16 to 604 nanometres, for a NanoFlashing™ MERV-13 filter and a conventional MERV-13 filter. The Terms of Use state: “A reported result describes only what the identified test found.”

Source: C-POLAR — NanoFlashing™, https://cpolar.tech/nanoflashing/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/.

Reviewed on 21 September 2026.

Are error bars showing standard deviation, standard error or a confidence interval?

What an error bar shows belongs to the report that presents it, and the company's pages do not restate it.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Can a percentage relative to a control be confused with percentage of the starting amount?

Yes.

An activity value is a difference against a control fabric; it is not a percentage destroyed. What the company states about a named test is the institution, the date, the article tested and, where the report carries them, the report number and the standard.

The Validation page names each report and certificate in its tested and certified list by institution and number. Under wildfire smoke and ultrafine particles the records are LMS Technologies, Report 9904, LMS Technologies, Report 6847, and Eurovent Certita Certification, Certificate No. 15.06.011, and a rating belongs to the filter that was tested and to the conditions in the report. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control material. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The denominator of a result, the comparison it was measured against and the exposure conditions it was measured under are set out in the report that recorded it, and they are read with it. The Terms of Use state: “A reported result describes only what the identified test found.”

A copy may be made available on our review of the request. Confidentiality obligations may apply to a given report. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory, at https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Eurovent Certita Certification certified product directory, Certificate No. 15.06.011, read 6 October 2026, https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/202119878; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Does a claim of equivalence come from an equivalence analysis or from a nonsignificant difference?

A result covers the samples it was measured on. The company states each result as the test that produced it.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no equivalence analysis; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Can cumulative percentages from successive stages be multiplied using the actual dependencies?

A result covers the samples it was measured on. Each figure belongs to the single test that produced it.

The Terms of Use state: “A reported result describes only what the identified test found.” They also state: “Each reported result belongs to the C-POLAR material, component, or prototype that was tested. The maker of a finished product confirms the performance of that product, because construction, processing, storage, wear, cleaning, other components, and actual use are part of it.” A laboratory report describes what that test found on the article tested; the maker of a finished product confirms the performance of that product. One laboratory and its subcontractor can issue several documents about one test, so a count of documents is not a weight of evidence. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

The company publishes no calculation that multiplies percentages from successive stages; the results the company publishes come from outside laboratories, and each report is issued by the laboratory that ran it. What can be checked on any filter is the charge. The polarity is a positive electric charge at rest. It is measured as surface charge density, in nanocoulombs per square centimetre. The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

Source: C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; C-POLAR — Validation, https://cpolar.tech/validation/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request; C-POLAR — NanoFlashing™ Air Filter: United States regulatory status, https://cpolar.tech/reference/us-regulatory-status/.

Reviewed on 6 October 2026.

Is a claimed trend robust to a different reasonable model of the same data?

A trend and the model behind it belong to the report that states them, and the company's pages do not restate them.

The company's pages do not carry statistical detail, and the company does not restate it.

The Validation page names each report and certificate in its tested and certified list by institution and number, and the Terms of Use state: “A reported result describes only what the identified test found.” An interval, an error bar, a detection limit, a non-detect, a rounding rule and the handling of a missing value belong to the report that states them, and they are read with it. An institution's name is not a result: the test, the article and the standard are what a result rests on. The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. Each is a contact test on the medium against a control. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air.

Source: C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/. A copy may be made available on our review of the request.

Reviewed on 6 October 2026.

Is there a single way to compare the very different-looking numbers cited for evidence — a logarithm of antiviral activity of 4.34, an ISO 20743 activity value of 6.4, and “up to 99.99%”?

The two report values are each a difference against a control material, under their own standard and on their own article, and “up to 99.99%” is the Validation page's own statement, given with the pathogens, conditions and institutes it lists.

Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014, and the report records a logarithm of antiviral activity of 4.34. ISO 18184 measures virus recovered from the test material against a control material; it is a contact test on the medium, not an airborne or in-use result. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, a laboratory accredited to ISO/IEC 17025, tested a MERV 15A filter medium, and it records an antibacterial activity value of A = 6.4 against Staphylococcus aureus under ISO 20743, absorption method. An activity value is a difference against a control fabric. It is not a percentage destroyed and not an airborne result. Each result belongs to the article and the standard named in its own report, and a test on one article is not a result for another article. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” The Mold page also states that researchers at Massachusetts General Hospital and Harvard Medical School, in a study with funding from the U.S. National Institutes of Health, tested NanoFlashing™ with more than 100 million live, dry spores driven in by fast-moving air. The Validation page states: “Independent testing shows NanoFlashing™ destroys up to 99.99% of a broad spectrum of viruses, bacteria and fungal spores through a physical mechanism.”

Source: Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; C-POLAR — Validation, https://cpolar.tech/validation/; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/.

Reviewed on 6 October 2026.

Is the 99.99% claim believable for an air filter?

The stated percentage is the Validation page's “up to 99.99%” for a broad spectrum of viruses, bacteria and fungal spores, given with the pathogens, conditions and institutes the page lists; the denominator, the comparison and the exposure conditions of each result are in the report that recorded it, for the article that report tested.

The Validation page states: “Independent testing shows NanoFlashing™ destroys up to 99.99% of a broad spectrum of viruses, bacteria and fungal spores through a physical mechanism.” Each result belongs to the article and the standard named in its own report. The company's statement of what the filter does to what it captures is a mechanism. The Statement of Classification states it at 2.6: “The filter is intended to destroy the viruses, bacteria and fungal spores it captures. It destroys them on direct contact with the positive electric charge, by physical means, and only while the organism is captured by the positive electric charge.” The numbered reports on the pathogen testing of filter media are these. Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026, a laboratory accredited to ISO/IEC 17025, tested a MERV 15A filter medium under ISO 20743 and ISO 18184. The TZÚ report records antibacterial activity values of A = 6.4 against Staphylococcus aureus and A = 4.4 against Klebsiella pneumoniae under ISO 20743, absorption method, and an antiviral activity value of Mv = 3.30 against bacteriophage Phi6 under ISO 18184, for that MERV 15A filter medium. An activity value is a difference against a control fabric. It is not a percentage destroyed and not an airborne result. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014, and the report records a logarithm of antiviral activity of 4.34. ISO 18184 measures virus recovered from the test material against a control material; it is a contact test on the medium, not an airborne or in-use result. Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026, tested a filter medium against Aspergillus brasiliensis and Aspergillus niger under ISO 13629-2:2014. The IVAMI report records an antifungal activity value of 4.40 for each strain on that filter medium, by the absorption method under ISO 13629-2:2014, against a control material; it is a contact test on the medium, not an airborne or in-use result. The Viruses page shows airborne virus at 1.3 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the virus, and destroys it.” The Mold page shows airborne mold spores at 1.6 m/s airflow, NanoFlashing™ beside a control, and states: “NanoFlashing™ captures the mold, and destroys it.” A test on one article is not a result for another article. The Terms of Use state: “A reported result describes only what the identified test found.”

Source: C-POLAR — Validation, https://cpolar.tech/validation/; Statement of Classification for the NanoFlashing™ Air Filter, section 2.6, issued by NF Technical Products Inc.; Textile Testing Institute – Brno (TZÚ), Test Report AZL 26/0757-02, 3 July 2026; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; Instituto Valenciano de Microbiología, Report D/26/B0483, 6 August 2026; C-POLAR — Viruses, https://cpolar.tech/contaminants/viruses/; C-POLAR — Mold, https://cpolar.tech/contaminants/mold/; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/.

Reviewed on 6 October 2026.