Comparing MERV and FPR Ratings for Air Pressure: An Expert's Guide

When it comes to air filtration, two of the most commonly used rating systems in the industry are MERV and FPR. MERV, or Minimum Efficiency Reporting Value, is the primary rating system used by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE). It uses a scale of 1 to 16, with higher ratings indicating better filtration of air pollutants. The FPR system, on the other hand, takes into account both the pressure drop and dust-holding capacity of air filters, which are aspects not addressed by MERV or MPR systems.

In general, a MERV 8 filter can filter 90% of particles suspended in the air, a MERV 11 can remove around 95%, and a MERV 13 can block approximately 98%. 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. Filterbuy offers MERV 8, MERV 11 and MERV 13 air filters and ovens, which cover the normal range of household needs by providing clean air and protecting air conditioning equipment. Most residential areas can remove contaminants from MERV 8 to MERV 13, while most hospitals use MERV 14 to MERV 20.

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 increasing system voltage. Some filters on their website have both an FPR and a MERV rating, and at least one with an FPR of 10 is listed as equivalent to either the MERV-8 or the MERV-13. In my opinion, the FPR system is a more comprehensive classification system for air filters compared to the MERV and MPR systems. 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. In these cases, a MERV 11 air filter can offer additional benefits and capture a wider range of particles that would pass through a MERV 8 filter.

The main drawback of using filters with an FPR rating of 8 to 9 is that they will reduce airflow more than filters with a lower FPR rating. In conclusion, both the FPR and MERV classification systems have differences that make it difficult to directly compare them with each other. However, understanding how each system works can help you choose the best filter for your home or business. Knowing how each rating system works will help you make an informed decision when selecting an air filter for your home or business.

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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