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What is MERV, MPR, FPR Rating?

MERV Rating is the Minimum Efficiency Reporting Value for air conditioner furnace filter media as determined by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, ASHRAE.  MERV is the primary international air conditioner furnace filter industry standard and is used for rating the ability of a furnace filter to capture and hold particles and pollutants.  The measurement used in these ratings is a Micrometer, or micron.  

 

  • A micron is one millionth of a meter (0.000001m) and is not visible to the human eye.  
  • A piece of copy paper is about 100 microns.
  • A human hair averages 80 microns in size.
  • Pet dander is 2-4 microns and can linger in the air for hours before it settles on a surface!


NordicPure.com uses the MERV Rating system.  NordicPure.com AC Furnace Air Filters are manufactured direct since 1960.  We have all standard AC Furnace Air Filters and all custom sized AC Furnace Air Filters. In the average American home, the most common air filter is only a MERV 4.  These are usually the furnace filters that you can see through and do not stop particles smaller than 10 microns.   Most residential systems are well able to use the MERV 12.

   

  • MERV Rating is the established air filter industry rating system, but, some companies have developed their own rating systems, based on the ASHRAE MERV Rating.  
  • MPR Rating, or Microparticle Performance Rating, was developed by a large manufacturer to grade their air filters based on the ability to filter air particles smaller than 1 micron.   The microparticle performance rating is not considered to be the industry standard by the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).  The published MPR Rating numbering system is a scale of 0 2700, with their highest published furnace filter equaling the Nordic Pure MERV 13.  
  • FPR Rating, or air Filter Performance Rating, is a grading system that uses a color/number system on a scale of 4 (green circle) to 10 (blue circle).  Some of their air conditioner filter descriptions refer to the MERV Rating and the MPR Rating, but dont always agree.

Its important to note that the MERV Rating is the MINIMUM initial efficiency rating.  Its the efficiency rating given to the air conditioner furnace filter when it is brand new and is expressed as a percentage of the total airborne particles of a certain size.  As the new air conditioner furnace filter traps more debris, it becomes more efficient trapping the smallest particles as time goes by.  Eventually, every air filter will trap the tiniest particles less than 1 micron, until it becomes so dirty that air cannot get through.  Air Filter Gages measure the building pressure behind the aging furnace filter and can let you know its time for a AC Furnace Air Filter.  Our customers also benefit from our Free Reminder Service that will automatically notify you by email or phone that its time to check, change or replace your air conditioner furnace filters.

Nordic Pure manufactures many different air filter media options:  MERV 7, MERV 7 Plus Carbon, MERV 8, MERV 8 Plus Carbon, MERV 10, MERV 10 Plus Carbon, MERV 11, MERV 11 Plus Carbon, MERV 12, MERV 12 Plus Carbon, MERV 13, MERV 13 Plus Carbon, MERV 14, MERV 14 Plus Carbon, MERV 15 and MERV 15 Plus Carbon.

 

Nordic Pure AC Furnace Air Filters are available in ½ inch air filters, 1 inch air filters, 2 inch air filters, 4 inch air filters, 5 inch air filters, and 6 inch air filters.  Custom size furnace air filters are also available.  Please call us at 1-800-590-0339.

For more information on What is MERV, MPR, FPR Rating, please see our FAQs.

 

MERV, MPR, FPR, RATING

MERV Rating

MPR Rating

FPR Rating

ASHRAE MINIMUM INITIAL EFFICIENCY

Containment and Particles

Uses

.30 to 1.0 Microns

1.0 to 3.0 Microns

3.0 - 10.0 Microns

MERV 19-20 (HEPA)

N/A

N/A

99.99-99.999%

 

 

< 0.30 Micron
carbon dust
sea salt
all combustion smoke

Clean Room Manufacturing
Electronics Manufacturing
Pharmaceuticals
Carcinogenic Materials
Hospital Inpatient Care
Surgery
Superior Commercial Buildings

MERV 17-18 (HEPA)

N/A

N/A

> 95%

 

 

MERV 16 (HEPA)

N/A

N/A

> 95%

> 95%

> 95%

MERV 14-15

N/A

N/A

75 - 95%

> 90%

> 90%

.30 to 1.0 Microns
All Bacteria
Tobacco Smoke
Fireplace Smoke
Droplet w/Virus (sneeze)
Smog

MERV 13

Black 2200

10 Blue Rating

< 75%

> 90%

> 90%

Superior Residential Property
Superior Commercial Property

MERV 12

Navy Blue 1900

 

80 - 90%

> 90%

Purple 1500

 8-9 Purple Rating 

1.0 to 3.0 Microns
Auto Emissions
Dust
Baking Flour
Pet Dander

MERV 11

Red 1000

7 Red Rating

 

65 - 79%

> 85%

MERV 10

 

 

 

50 - 64%

> 85%

Residential
Commercial
Industrial Workspaces

MERV 8

Light Blue 600

5 Green Rating

 

 

70 - 85%

3.0 to 10.00
Mold Spores
Household Dust/Spray
Hair Spray
Dust Mite
Pollen
Sanding Dust
Textile / Carpet Fibers

MERV 7

 

 

 

 

50 - 69%

Minimum filtration workspace
Window units
Fiberglass filters
polyester air filters

MERV 6

400

 

 

 

35 - 49%

MERV 0 - MERV 5

 

 

 

 

20 - 34%

 

NordicPure.com Manufactures these MERV Ratings:

 

Nordic Pure® AC Air Filter and Furnace Filter manufacturer since 1960. (972) 382-2355
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