Air Filter Merv Rating Meaning
An air filter with a rating of merv 6 removes lint, household dust, and pollen.
Air filter merv rating meaning. The merv rating on an air filter was designed by the american society of heating, refrigerating, and air conditioning engineers (ashrae) to rate the effectiveness of air filters. Higher value merv rating equates to finer filtration, meaning fewer dust particles and other airborne contaminants can pass through the filter. Below is a chart from john semmelhack showing the percentage of particles removed by size range of particle and the merv rating of the filter.
The test is based on particle size. One common term used when discussing air filtration is the merv rating. Take a moment to understand what merv ratings are, and how they applied to your application.
Check out what each merv range of filters catches to find the right fit for your. The smaller pores in more highly rated air filters create resistance to air. Merv 13 filters will also remove bacteria and virus carriers.
The merv filter rating is the domestic and international industry standard rating system established by the american society of heating, refrigerating, and air conditioning engineers. Merv rating chart standard 52.5 minimum efficiency reporting value dust spot efficiency arrestance typical controlled contaminant typical applications and limitations typical air filter/cleaner type 20 n/a n/a < 0.30 pm particle size cleanrooms >99.999% eff. Here’s a simple chart we put together to explain each of the different air filter ratings and what the differences are:
The merv rating system is intended to be used to determine the filter’s ability to remove particulates from the air. Merv, otherwise known as minimum efficiency reporting value, is a system used to evaluate the efficiency of an air filter based on how effective it is at catching particles of varying sizes. Minimum efficiency reporting value (merv) is a standard that rates the overall effectiveness of air filters.
It is an acronym for high efficiency particulate air [filter] (as officially defined by the u.s. A low merv rating means that the filter does not remove as many particulates from the air. Ashrae developed the merv air filter efficiency rating system.
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