July 2, 2022


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MERV vs MPR vs FPR Filter Scores


For those who personal an HVAC system, you could already know that it’s vulnerable to common upkeep and one of the necessary upkeeps is to alter the air filter usually. Specialists say that the air filter from an HVAC system must be changed each three months of utilization. This era also can kind of change relying on the surroundings the system runs on. Nonetheless, not all air filters are the identical, and they’re rated in another way.

More often than not, the HVAC system will already inform the score of the required air filter within the proprietor’s guide. Nonetheless, not all techniques depict the score clearly, and somewhat it may be very complicated. In such a case, it’s as much as the person to infer the required score of the air filter and set up it accordingly. Subsequently, on this article, we are going to enable you to decide what completely different air filter score means and evaluate the completely different score system at the moment used for air filters.

Why are Air Filter Scores Wanted?

The air filter score, for essentially the most half, determines how a lot safety it is going to present from the airborne particle. Shopping for a better score air filter from Customized Filters Direct means it is going to block smaller mud particles and thus higher safety. The unit micron is used to find out the dimensions of those airborne particles, and dirt will be between 0.05 to 500 microns. Not simply mud, different high quality particles, viruses, smoke, pollen, micro organism, and many others., can be filtered by an air filter, and the score determines whether or not it could actually block a sure particle or not.

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Particles lower than 10 microns can simply enter the lungs throughout respiration. Thus, it’s important to know in case your air filter can block particular particles. In abstract, the score system determines the effectiveness of the air filter and choosing the right one is important to offer ample safety.

MERV, MPR, and FPR Filter Scores

At the moment, there are three filter rankings used globally. These three are MERV, MPR, and FPR. From these three, MERV is extensively used. However it’s also possible to encounter different two score techniques, and it is very important know primary details about all of them.

MERV: Its full kind is “Minimal effectivity reporting worth” and is created by ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning). Air filters are scored from 1 to twenty utilizing the MERV score.

MPR: The 3M firm originated the “Micro-Particle Efficiency” system that charges the air filter from 100 to 2800. This score system is barely used for merchandise manufactured by the 3M firm.

FPR: “Filter Efficiency Ranking” air filter score system is distinctive to solely Residence Depot merchandise, and it’s ranged from 4 to 10.

Comparability of MERV vs MPR vs FPR Filter Scores

Are you able to interchange the air filter score system? After all, you possibly can! However first, it’s important to know how one can equate one system with one other. Following is the comparability desk between MERV, MPR, and FPR air filter score techniques.

Blocked Particles Utilization MERV MPR FPR
Mud, Lint N/A <6 <300 <4
Spores, Pollen, Mite Particles Fundamental Residential 6 – 8 300 – 1000 4 – 5
Smog, Smoke, Pet pores and skin flecks Residential and Business 8 – 11 1000 – 1900 6 – 7
Virus, Micro organism, Airborne particles from the mouth Smoking lounges 11 – 13 1900 – 2800 8 – 9
Nanoscale particles Hospital and Surgical procedure Rooms >13 >2800 10


As you possibly can see, you could require a unique air filter relying in your utilization of your HVAC. However you could first confer with the HVAC system proprietor’s guide earlier than deducing one by yourself. In any other case, you possibly can comply with our comparability and select accordingly.

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