How is the charge measured?

Which measured quantity is being described as polarity: potential, charge density or something else?

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” NanoFlashing™ is a permanent positive polarity engineered into filter media itself. It is a physical property of the filter. A charge is a physical property. It is not a substance or a mixture of substances. The filter is passive. It draws no power, and it has no power supply, electrode, lamp or reservoir. The NanoFlashing manufacturing process produces the charge, and 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 2.2, 2.3, 2.4 and 3.6, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf.

Reviewed on 21 September 2026.

Are the reported charge values traceable to calibrated instruments?

The company names the quantity it measures, surface charge density in nanocoulombs per square centimetre, and it states no charge value, so it publishes no traceability chain for one.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. The company publishes no measurement procedure, no instrument record and no uncertainty budget. It names the quantity and the unit, and it states no value, no traceability chain and no data set. 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 2.2 and 2.3, issued by NF Technical Products Inc.

Reviewed on 6 October 2026.

Was the instrument's measurement range appropriate for the reported signal?

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

The company publishes no measurement procedure, no instrument record and no uncertainty budget. The instrument, its range and its settings are not published, and no value is published against which a range could be judged; the charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.

Reviewed on 6 October 2026.

Is background electrical noise reported alongside low-level measurements?

Noise floors and the way they are reported are part of a measurement procedure, and the company describes the charge as a measured property: a positive electric charge at rest, measured as surface charge density, in nanocoulombs per square centimetre.

The company publishes no measurement procedure, no instrument record and no uncertainty budget, and it states no value and publishes no data set. 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 2.2 and 2.3, issued by NF Technical Products Inc. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 6 October 2026.

Are charge measurements normalised to area, mass or some other quantity?

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” Surface charge density is charge per unit area, and nanocoulombs per square centimetre is the unit in which the company states it. The company publishes no measurement procedure, no instrument record and no uncertainty budget. 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 2.2 and 2.3, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf.

Reviewed on 6 October 2026.

Does normalisation use the projected area or the true fibre surface area?

The charge is normalised to area: the polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre.

Which area a figure is divided by is part of a measurement procedure. The company publishes no measurement procedure, no instrument record and no uncertainty budget; 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 2.2 and 2.3, issued by NF Technical Products Inc.

Reviewed on 6 October 2026.

Are storage measurements made under the same environmental conditions as the initial measurement?

The environment in which a measurement is made is part of a procedure, and the company publishes none.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. The company publishes no measurement procedure, no instrument record and no uncertainty budget. 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 2.2 and 2.3, issued by NF Technical Products Inc.

Reviewed on 21 September 2026.

Can a laboratory reproduce the stated physical measurement without proprietary interpretive software?

The charge is measured on every production run, and the measurement can be repeated on any filter, upon request.

The polarity is a positive electric charge at rest, and it is measured as surface charge density, in nanocoulombs per square centimetre. The coulomb is the unit of electric charge, and the National Institute of Standards and Technology gives the quantity the coulomb measures as “electric charge, amount of electricity.” That is a physical quantity in a published unit, and the company publishes no software and no interpretive step. The company publishes no measurement procedure, no instrument record and no uncertainty budget.

A laboratory that measures a filter is measuring that filter, and the measurement can be repeated on any filter, upon request.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.2 and 2.3, issued by NF Technical Products Inc.; National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811 (2008 ed.), § 4.2.1, Table 3, https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication811e2008.pdf. A materials review that needs more than the company's published pages is arranged in writing, through [email protected] on the Contact page.

Reviewed on 6 October 2026.

Does a pass in a charge test predict a pass in the claimed functional test?

A published result belongs to the article that was tested, under the conditions named in the report that recorded it.

A charge measurement and a filtration or destruction test are different tests of different things, and the company does not present one as the other. The functional records the Validation page names include LMS Technologies, Report 9904 and LMS Technologies, Report 6847, and the peer-reviewed paper Gong, Or, Sze et al., Microbiology Spectrum 12(9), e0409723, doi:10.1128/spectrum.04097-23. The Terms of Use state: “A reported result describes only what the identified test found.”

What the company states about the mechanism is that the filter captures airborne particles mechanically and by electrostatic attraction, and that it is intended to destroy the viruses, bacteria and fungal spores it captures, on direct contact with the positive electric charge, by physical means, and only while the organism is captured by the positive electric charge.

Source: Statement of Classification for the NanoFlashing™ Air Filter, sections 2.5 and 2.6, issued by NF Technical Products Inc.; C-POLAR — Terms of Use, section 3, https://cpolar.tech/terms/; C-POLAR — Validation, https://cpolar.tech/validation/; Gong, Or, Sze et al., Microbiology Spectrum 12(9), e0409723, https://journals.asm.org/doi/10.1128/spectrum.04097-23.

Reviewed on 6 October 2026.

Is there a recognized standard written specifically for a “destroys on contact” claim on a solid article, separate from filtration-efficiency standards?

Each contact test the company cites is reported under its own standard, on a named medium, against a control material: ISO 18184 for viruses, ISO 20743 for bacteria and ISO 13629-2:2014 for fungal spores.

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 company names no single standard for a claim of destruction on contact. Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020, tested a filter medium against influenza A virus (H3N2) under ISO 18184:2014. 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. Each is a contact test on the medium against a control material; it is not an airborne result and not a result for a finished filter in a building. 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. ASHRAE 52.2 and ISO 16890, the standards named for the Validation page's air-filtration ratings, measure what a filter takes out of the air, and they say nothing about what happens to what is captured.

Source: Statement of Classification for the NanoFlashing™ Air Filter, section 2.6, issued by NF Technical Products Inc.; Guangdong Detection Center of Microbiology, Report 2020FM20686R01E, 13 August 2020; 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; 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.