Can a minimum efficiency rating be substituted for a clean-air delivery rating?
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Can a minimum efficiency rating be substituted for a clean-air delivery rating?
They measure different things, on different articles.
MERV is the minimum efficiency reporting value under ANSI/ASHRAE Standard 52.2. It is built from the lowest efficiencies the filter reaches in each particle size range as dust is loaded during the test, not from a single reading on a clean filter. An ISO 16890 class rates a filter against a particle fraction, ePM1, ePM2.5 or ePM10, and the class the filter holds is the one the certificate states. A clean air delivery rate is a rating of a portable room air cleaner as a whole appliance, measured under ANSI/AHAM AC-1, the standard for portable household electric room air cleaners. One rates a filter; the other rates an appliance with its own fan, its own housing and its own airflow. This site publishes no clean air delivery rate for its filter. Certificate No. 15.06.011 covers a ten-pocket bag filter, not a flat panel filter, and Report 6847 is on a 24 × 24 × 30 in. pocket filter; a rating belongs to the construction that was tested. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory. NanoFlashing™ is a technology; the name, rating and sale of a product that carries it are set by that product's maker and seller.
Source: ANSI/ASHRAE Standard 52.2, as named in LMS Technologies, Report LMS#9904, 28 April 2025, a single-pass fractional efficiency test on a 24 × 24 × 2 in. pleated air filter in an ASHRAE 52.2 test duct, in accordance with standard LMS aerosol test procedures, and Report 6847, ASHRAE 52.2 with Appendix J; ISO 16890, as named in Eurovent Certita Certification Certificate No. 15.06.011; C-POLAR — Validation, https://cpolar.tech/validation/; Eurovent Certita Certification certified product directory, read 19 September 2026, https://www.eurovent-certification.com/. A copy may be made available on our review of the request.
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Sources
- LMS Technologies, Report LMS#9904, 28 April 2025, a single-pass fractional efficiency test on a 24 × 24 × 2 in. pleated air filter in an ASHRAE 52.2 test duct, in accordance with standard LMS aerosol test procedures, and Report 6847, ASHRAE 52.2 with Appendix J
- Eurovent Certita Certification, Certificate No. 15.06.011, ISO 16890
- C-POLAR — Validation
- Eurovent Certita Certification certified product directory, read 19 September 2026