Learn the differences between MERV, MPR & FPR to choose the best filter for your needs.
The three rating systems were created by separate organizations. 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. The other two systems were created by "3M" and "The Home Depot" to differentiate their offerings. However, at the end of the day, the ratings apply to the SAME filters!
As you have already learned, the MERV rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV
rates a filter’s ability to capture and hold particles and pollutants.
At Factory Direct Filters, we label our air filters by their MERV filter rating. Choose from four different options:
To better understand what sets the four ratings apart, take a look at our MERV rating chart!
MPR, or micro-particle performance rating, is a rating system developed by 3M. It rates the manufacturer’s filters and their ability to capture airborne particles smaller than 1 micron.
FPR, or filter performance rating, is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
Learn more about proper air filter maintenance and associated benefits.
FPR, MERV, MPR – it doesn't matter! In order to keep your air clean in your home or business, it is important to install replacements frequently.