Below, we’ll break down where the rating systems come from and how to use them when shopping for your next filter. The MERV, MPR, and FPR rating systems each consist of a range of numbers that represent the filtration effectiveness based on the micron size that it can filter out. Any particulates under around 100 microns can actually be inhaled into the nose. 001 microns and 10 microns can reach deep into the lungs by being inhaled. It’s important to note that anything in the size range between. Here’s a handy chart to give you an idea of the range of micron sizes: Micron sizes can range anywhere from microscopic to visible to the human eye. When it comes to assessing air filter filtration capacity, we use a term “micron” which allows us to know how the smallest size of particle that an air filter can block.

Without a standardized air filter rating method, homeowners and other HVAC enthusiasts are left in the dark on how well their air filter works against a wide range of airborne particles, including: The higher the rating (for MERV, FPR, and MPR), the smaller the air and dust particles your home ac air filter can capture. The quality of an air filter is assessed by its rating, which tells you what capacity the filter has in blocking our particulates in the air. If looking to buy a good replacement air filter and you’re trying to make sense of how MERV, MPR, and FPR ratings compare, we have put together a simple guide below. These three acronyms can make the air filter shopping experience much more difficult than it really needs to be. There are three popular filter rating systems that are used to rate the filtration capacity of home and commercial air filters: MERV, MPR, and FPR. The Difference Between MERV, MPR, and FPR Air Filter Ratings Please make sure it's turned on in your browser. We'd like to warn you that FilterBuy website may not work properly without JavaScript enabled.

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