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Learn how to reduce airborne infectious aerosol exposure with HVAC filters, air cleaners, and other technologies. Find guidance, FAQs, and glossary of terms for COVID-19 and airborne transmission.
1 kwi 2020 · ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDS ASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, by suggesting safe practices in designing and installing equipment, by providing proper definitions of this equipment, and by prov iding other information
We’ll look at MERV 1-20 ratings in the MERV rating chart (you’ll find the chart further on). We’ll also look into how high a MERV rating an air purifier should have to best filter out different air contaminants (pollen, mold spored, smoke, dust, etc.).
MERV values in the 52.2 test reporting. Note: This table is intended to be a general guide to filter use and does not address specific applications or individual filter performance in a given application.
The table below provides approximate relationships between ratings under the ASHRAE MERV and ISO 16890 test methods. The current recommendations would suggest using a filter with an ePM1 rating under ISO 16890.
Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to report the effectiveness of air filters in more detail than other ratings.
The standard filter selection for office buildings is a MERV 13, which has an efficiency of 31% at 0.3 micron particle size. Both of these filters have excellent sub-micron particle capture efficiency.
