When it comes to air filtration, there are a variety of rating systems used to measure the efficiency of air filters. One of the most popular is the MERV (Minimum Efficiency Reporting Value) classification system, which is used to compare different air filters. However, there is another rating system, FPR (Filter Performance Rating), which was developed by The Home Depot for brands sold in its stores, including Honeywell. In this article, we'll explore the differences between FPR and MERV ratings and how they can help you choose the right air filter for your home. In general, FPR 6 — 7 is equal to MERV Ratings 8 — 11. FPR 8 — 9 equals MERV Rating 11. FPR 10 equals MERV Ratings 13. While FPR and MERV ratings are similar, they are not directly correlated.
This means that when it's time to buy a new air filter for your boiler or air conditioner, you should check its MERV rating to determine its efficiency. In standard cases, a MERV 8 air filter is considered a more than adequate option. However, if you're looking to combat increased outdoor air pollution, pet fur and dander, or triggers for asthma and allergies, you may need a higher MERV rating. The higher the MERV index (between 1 and 1), the more and smaller particles will seep out of the air. Newer units should not have airflow problems with higher MERV ratings, although older models may work more with a MERV 13 filter installed than when they originally had a MERV 6 filter in the air intake. Household air filters with higher MERV values should also be changed at a higher frequency because of their greater efficiency and ability to capture particles. The MERV classification system is beneficial for homeowners looking to change the brand of air filters or compare available options.
To help you understand what air filters in a given MERV range can do and what they can't do, I've included a MERV rating chart. For example, if an air filter has a stated MERV rating of between 1 and 4, it can remove pollen, dust mites, textile fibers, fibers from carpets and sanding dust up to a particle size of 10 microns. Any filter rated 4 to 5 on the FPR scale must be good enough to remove common household air contaminants, such as dust, lint, dust mites, pet dander, and pollen. While MERV 11 filters are slightly more expensive, costing just a few dollars, indoor air quality can be improved to help relieve people with respiratory problems.
