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16 x 16 x 1 Filtrete Micro Allergen Reduction Filter - #9816
(case of 6 Filters)
16" X 16" X 1" FiltreteŽ Micro Allergen Reduction Filter from 3M - #9816 - 6 pack
The FiltreteŽ Micro Allergen Reduction Filter carries a 3M Microparticle Performance Rating (MPR) of 1000 - roughly equivalent to a MERV 11 rating
Click here for detailed comparison of 3M FiltreteŽ 1" Filters
WHY USE MPR RATHER THAN MERV RATING?
The Heating, Ventilating and Air Conditioning (HVAC) industry uses the ASHRAE 52.2 Standard, which assigns a Minimum Efficiency Reporting Value (MERV) to a filter. One part of MERV reports a filter's ability to capture medium to large particles between 1 and 10 microns. This value is helpful in comparing the performance of different filters but it is not adequate alone because particles greater than one micron make up only about 1% of the contaminants in your indoor air.
Another part of MERV addresses submicron particles. 3M calls this the MPR or Microparticle Performance Rating. It measures a filter's ability to capture particles between 0.3 and 1.0 micron. Based on independent laboratory tests, 3M's MPR measures a filter's ability to capture submicron particles that make up 99% of the particles in the air, such as bacteria, smoke and smog.