The Filter Performance Rating (FPR) system is a numerical scale from one to ten, with ten being the best. Developed by The Home Depot, it is used to measure the ability of an air filter to capture particles. It is used for brands of HVAC air filters sold in their stores, and is a great starting point for homeowners who are just beginning to use HVAC air filters. The FPR scale ranges from four to ten, with four being “good filters” and ten being “premium filters”.
A filter rated four to five on the FPR scale should be good enough to remove common household air contaminants, such as dust, lint, dust mites, pet dander, and pollen. The FPR also indicates what type of airborne contaminants each filter is ideal for capturing. The Minimum Efficiency Report Value (MERV) air filter rating system is the industry standard for measuring the ability of an air filter to capture particles. It is beneficial for homeowners looking to change the brand of air filters or compare available options.
The following table explains the relationship between the numerical scales of the MERV rating system and the FPR system:When choosing an air filter, make sure you choose one with an appropriate rating based on your home conditions. If you have pets and allergies, a low-rated air filter won't do any good. The MERV classification system is the ideal air filter comparison classification system.