MERV vs. MPR vs. FPR Rating Systems

air filter ratings explained

Learn the differences between MERV, MPR & FPR to choose the best filter for your needs.

WHAT IS THE DIFFERENCE BETWEEN MERV, MPR, AND FPR AIR FILTER RATINGS?

The three rating systems were created by separate organizations. The MERV filter rating is the domestic and international industry standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. The other two systems were created by "3M" and "The Home Depot" to differentiate their offerings. However, at the end of the day, the ratings apply to the SAME filters!

WHAT IS MERV FILTER RATING (MINIMUM EFFICIENCY REPORTING VALUE)?

As you have already learned, the MERV rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.

At Factory Direct Filters, we label our air filters by their MERV filter rating. Choose from three different options

• MERV 8
• MERV 11
• MERV 13

To better understand what sets the four ratings apart, take a look at our MERV rating chart!

WHAT IS MPR (MICRO-PARTICLE PERFORMANCE RATING)?

MPR, or micro-particle performance rating, is a rating system developed by 3M. It rates the manufacturer’s filters and their ability to capture airborne particles smaller than 1 micron.

WHAT IS FPR (FILTER PERFORMANCE RATING)?

FPR, or filter performance rating, is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
Learn more about proper air filter maintenance and associated benefits.

Advantages of Frequently Changing Air Filters

FPR, MERV, MPR—it doesn't matter—in order to keep your air clean in your home or business, it is important to install replacements frequently.

At Home

• Captures indoor air pollutants
• Reduces your energy bill
• Lowers air-related allergy/asthma indoor triggers
• Diminishes the growth of mold and mildew

At Work

• Reduced exposure to airborne allergens, toxins, and irritants
• Better concentration
• Improved sanitary conditions by OSHA standards
• Chemical / biological contamination is controlled