"acceptedAnswer": { The chart below shows a detailed description for each merv rating 1 through 16. It is 75% efficient on particles 0.3 -1.0 microns, 85% efficient on particles 1-3 microns and 95% efficient on particle larger than 3 microns. It should be noted that pressure drop through a high-MERV filter varies depending on the velocity of the air flow. 1994-2021, W.W. Grainger, Inc. All Rights Reserved. Bryan. to the test filter, expressed in grams, and its average arrestance. The difference between the FPR and MERV ratings is that FPR uses a scale of 1-10, while MERV uses a scale of 1-16. In some ways they are better than all media filters in others they have drawbacks. Always refer to your air handler manufacturers guide before changing your air filter. We are hiring! Refer below to four average contaminant size intervals for MERV rating consideration. } The High Capacity MERV 14 Media filter (HC-14) provides a large volume of dust capacity. Higher MERV But Lower Air Resistance Can Happen. 3M Pro Series Residential Air Cleaning Filters 4" and 5" filters last up to 6 to 12 months. Can you provide some insight on how ASHRAE 52.2 Appendix J plays a role in the data tables mentioned above? Guaranteed against media pack failure to 5.0 w.g. The furnace filter frames use a M 10 rated level air filter. //

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