What is MERV Rating?
MERV, which stands for Minimum Efficiency Reporting Value, is a rating that was developed by ASHRAE (the American Society of Heating, Refrigerating, and Air-Conditioning Engineers) and it is used to assess the filtering power of an air conditioner or furnace filter. The MERV scale consists of ratings from 1 to 16, with filter performance being greater as the number increases. On the MERV scale, dirt particles are graded from 0.3 microns to 10 microns. A micron is 1 millionth of a millimeter, and just to give you an idea of just how small that is, you can look at the size of a single human hair. The average strand of human hair is about 100 microns thick, so imagine just how small 0.3 microns of dirt is! Why is MERV Rating Important? When you’re purchasing an air conditioner or furnace filter for your home, you want to be sure that you are buying a filter that will keep the air in your home clean. While all of our filters will provide you with the filtering efficiency needed to improve
