When it comes to air filtration, two of the most commonly used rating systems are the Minimum Efficiency Reporting Value (MERV) and the Filter Performance Rating (FPR). Developed by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE), the MERV rating system uses a scale of 1 to 16, with higher ratings indicating better filtration of air pollutants. The FPR system, on the other hand, is a numerical scale that is used to measure the efficiency of air filters. It is essential to understand the relationship between these two rating systems in order to make an informed decision when selecting an air filter for your home.
The FPR 6 — 7 is equivalent to the MERV 8 — 11 classification. Similarly, the FPR 8-9 is equivalent to the MERV 11. This means that if you are looking for a filter with a higher level of filtration, you should opt for a MERV 13 filter instead of a MERV 11 filter. However, it is important to note that older HVAC systems may not be able to handle a MERV 13 filter without overloading the system. Fortunately, you don't have to spend hours comparing the FPR and MERV ratings in order to make an informed decision. The following table explains the relationship between the numerical scales of the MERV classification system and the FPR system:
| MERV Rating | FPR Rating |
|---|---|
| MERV 8 — 11 | FPR 6 — 7 |
| MERV 11 | FPR 8-9 |
Newer units should not have any airflow problems with higher MERV ratings, but older models may work harder with a MERV 13 filter installed than when they originally had a MERV 6 filter in the air intake. Overall, understanding both the MERV and FPR ratings will help you get the most out of your heating and cooling system. Knowing how these two rating systems compare to each other will ensure that you select an air filter that meets your needs and provides optimal filtration. In conclusion, it is important to understand both the MERV and FPR rating systems when selecting an air filter for your home. The table above provides a quick reference guide for comparing these two rating systems. Additionally, it is important to consider your home's HVAC system when selecting an air filter as older models may not be able to handle higher MERV ratings without overloading.
