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9 Best air filter 20x25x4s of 2026

Save up to 29% off
  • Best Choice

    1

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
    Clicked 3 times in the last month
    Filterbuy

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)

    9.8
    Exceptional
    Our Rating
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  • Value for Money

    2

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
    Filterbuy

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)

    10% Off
    9.6
    Exceptional
    Our Rating

  • 3

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell & AprilAire, Allergen Defense, Electrostatic, 2-Pack. CHANGE YOUR FILTER OFTEN: Replace every 12 months
    Filtrete

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell & AprilAire, Allergen Defense, Electrostatic, 2-Pack. CHANGE YOUR FILTER OFTEN: Replace every 12 months

    24% Off
    • material:Fiberglass
    • size:20x25x4
    • usage:Furnace air filter
    • special features:Filtrete 3-in-1 technology
    • compatible device:Honeywell, Lennox furnaces
    9.4
    Excellent
    Our Rating

  • 4

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 2-Pack (Actual Size 19.88x24.63x4.31 in)
    Filtrete

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 2-Pack (Actual Size 19.88x24.63x4.31 in)

    21% Off
    • material:Electrostatically charged filter media
    • size:20x25x4
    • usage:Furnace, AC, HVAC
    • special features:CERTIFIED asthma and allergy-friendly
    • compatible device:Furnace, AC, HVAC
    9.3
    Excellent
    Our Rating

  • 5

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 2-Pack (Actual Size 19.88x24.63x4.31 in)
    Filtrete

    Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 2-Pack (Actual Size 19.88x24.63x4.31 in)

    29% Off
    • material:Electrostatically charged filter media
    • size:20x25x4
    • usage:Furnace, AC, HVAC
    • special features:CERTIFIED asthma and allergy-friendly
    • compatible device:Furnace, AC, HVAC
    9.2
    Excellent
    Our Rating
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  • 6

    2 Pack 20x25x4 Air Filter Replacement Compatible with Honeywell FC100A1037 Pleated HVAC, MERV 13 Furnace Filter, Foldable Design (Actual Size: 19.94 x 24.88 x 4.38 Inches)
    KEYINGXUAN

    2 Pack 20x25x4 Air Filter Replacement Compatible with Honeywell FC100A1037 Pleated HVAC, MERV 13 Furnace Filter, Foldable Design (Actual Size: 19.94 x 24.88 x 4.38 Inches)

    9.1
    Excellent

  • 7

    2 Pack 20x25x4 Air Filter Replacement Compatible with Honeywell FC100A1037 Pleated HVAC, MERV 13 Furnace Filter, Foldable Design (Actual Size: 19.94 x 24.88 x 4.38 Inches)
    KEYINGXUAN

    2 Pack 20x25x4 Air Filter Replacement Compatible with Honeywell FC100A1037 Pleated HVAC, MERV 13 Furnace Filter, Foldable Design (Actual Size: 19.94 x 24.88 x 4.38 Inches)

    9.0
    Excellent

  • 8

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
    Filterbuy

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)

    • material:Polyester, Aluminum, Plastic
    • size:2 Count Pack of 1
    • usage:Commercial/Residential
    • special features:Easy to Install, Dust Collection, Removable
    • compatible device:Furnace, Air Conditioner, Heat Pump, HVAC
    8.7
    Very Good
    Our Rating

  • 9

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
    Filterbuy

    Filterbuy 20x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)

    10% Off
    • material:Polyester, Aluminum, Plastic
    • size:2 Count Pack of 1
    • usage:Commercial/Residential
    • special features:Easy to Install, Dust Collection, Removable
    • compatible device:Furnace, Air Conditioner, Heat Pump, HVAC
    8.4
    Good
    Our Rating