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 This air filter captures up to 50% of small particles (1), like bacteria and particles that carry viruses, to help make your air cleaner. Use a 12-month 4-inch home HVAC filter in your compatible furnace, air conditioner or HVAC system. For optimal performance of your HVAC system, change your 4-inch furnace filter at least once per year. Fits systems calling for a filter thickness of 4.31" and larger. (1) % captured is based on ASHRAE 52.2 testing for 0.3 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing. (2) Based on 2024 Sago US Brand Health Survey of Residential HVAC Air Filters
DIFFERENT FROM NOMINAL SIZE: Slightly different from the nominal size, this air filter’s exact dimensions are 19.75 in x 24.63 in x 4.DESIGNED TO FIT: Honeywell and AprilAire Space-Gard brand media air cleaners
MAKE YOUR HOME YOUR SANCTUARY: MPR 1550 + MERV 12 AC Furnace Air Filter helps capture 50% of small particles from the air passing through it. (1)
CERTIFIED: This furnace filter is CERTIFIED asthma and allergy-friendly (2) and helps capture dust, lint and other allergens in your household air
CHANGE YOUR FILTER OFTEN: For optimal performance, make sure to change your 4-inch filter at least once every 12 months

Air filter size: 20 x 25 x 4
Minimum efficiency reporting values (merv): 12
Microparticle performance rating: 1550
Contaminants removed: Bacteria
Features: Pleated
Manufacturer: 3M
Thickness: 4 in
Material: Polypropylene
Rec. use: Residential

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