Understanding the Difference Between FPR and MERV Ratings

When it comes to air filtration systems, it can be difficult to understand the difference between the Filter Performance Rating (FPR) and the Minimum Efficiency Reporting Value (MERV). Both are useful, but the FPR may be easier to understand, since it uses a number system that is more intuitive.


scores are filtered from one to ten, with ten being the best. The FPR is a simple system that provides a clear score, however, it only applies to products you can find at Home Depot.

In terms of efficacy, it is difficult to choose between a MERV classification and an FPR classification. The MERV uses a rating scale from 1 to 16. The higher the MERV rating, the better the filter captures a variety of airborne contaminants.


filters usually filter 90% of the particles suspended in the air, MERV 11 can remove around 95% and MERV 13 can block approximately 98%. Most home improvement stores sell climate filters ranging from MERV 1 to MERV 13, although CR has tested models as tall as the MERV 16. A higher MERV rating may mean slightly more restricted airflow; however, most current HVAC systems are capable of handling a MERV 11 air filter without overloading the system.

However, if the MERV rating is too high (above MERV 1), it can increase system backpressure and block air flow through the central air system, worsening the efficiency of the air conditioning system. As an expert in SEO, I recommend changing your air filter regularly for optimal air quality in your home. Even if your filter has a fantastic MERV or FPR rating, you should change it every few months. Often, it's helpful to set a reminder to change the air filter.

Filterbuy offers MERV 8, MERV 11, and MERV 13 air and heating filters, which cover the normal range of household needs by providing clean air and, at the same time, protecting air conditioning equipment. In conclusion, when buying an air filter at Home Depot you can trust FPR ratings. For other cases, you'll need to use one of the other classification systems such as MPR or MP. The standard in air filtration is still the MERV rating system which is reliable and easy to understand. Newer units shouldn't have airflow problems with higher MERV ratings, although older models can work harder with a MERV 13 filter installed than when they originally had a MERV 6 filter in the air intake.

Darryl Coste
Darryl Coste

Friendly web scholar. Devoted student. Wannabe pizza fanatic. Subtly charming bacon fan. General entrepreneur. Infuriatingly humble troublemaker.

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