Best furnace filters Deals Online in the US
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26% OffFiltrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4 Pack (Actual Size 15.69 x 24.69 x 0.81 in)Free ShippingFiltrete - Best Value
35% OffFiltrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 15.719 x 24.72 x 0.84 in)Free ShippingFiltrete 
Aerostar 18x18x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
2 Pack X8788 MERV 16 Filter Replacement 20x26x5, Compatible with Pureair PCO20-28 Air Cleaner and Lennox X8788 FilterFree ShippingKEYINGXUAN
Filterbuy 20x20x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11)
Filtrete 16x25x1 AC Furnace Air Filter, MERV 5, MPR 300, Capture Unwanted Particles, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6-Pack (Actual Size 15.69x24.69x0.81 in)Free ShippingFiltrete
15% OffFiltrete 16x20x1 AC Furnace Air Filter, MERV 5, MPR 300, Capture Unwanted Particles, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6-Pack (Actual Size15.69x19.69x0.81 in)Free ShippingFiltrete-
PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust Electronic
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12% OffSimply 20x20x1 Air Filter, Merv 8, MPR 600, 6 Pack, Furnace Air Filter for HVAC (Actual Size: 19.75"x19.75"x0.75") DUST, Pet, & Allergy ControlFree ShippingSimply
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Filterbuy 20x20x2 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13)
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Filtrete 20x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 19.688 x 24.688 x 0.84 in)Free ShippingFiltrete
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10% OffAmazon Basics 16x20x1 Air Filter 6 Pack, MERV 8 AC Furnace Filters (Actual Size: 15.75" x 19.75" x 0.75")Free ShippingAmazon Basics
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FILTRETE- AIR-FILTER PLEATED FURNACE REPLACEMENT PAD DUST PACK 3, 6, 12 NEW
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Filtrete 20x25x5 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.63 x 24.75 x 4.31 in)Free ShippingFiltrete
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1 PACK or 3 PACK - Air Filter Standard Pleated FPR 5 Dust Filters Furnace AC
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AprilAire 213 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 20x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Filterbuy 16x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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Filterbuy 16x25x4 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 15.50 x 24.50 x 3.63)Filterbuy
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FILTRETE- AIR-FILTER PLEATED FURNACE REPLACEMENT PAD DUST PACK 3, 6, 12 NEW
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Filtrete 16x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, CERTIFIED Asthma & Allergy Friendly, Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.88x24.56x4.31 in)Free ShippingFiltrete
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Ventaerex AC Air Furnace Filters - Cut to Fit - Washable Filters
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Aerostar 16x25x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack New
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18% OffFiltrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell & AprilAire Space-Gard, Allergen Defense, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31)Free ShippingFiltrete
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Filterbuy 16x25x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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AprilAire 413 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 16x25x4 Air Filter (Pack of 2)Free ShippingAprilaire
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Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack
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Filtrete 16x25x5 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 15.63 x 24.74 x 4.31)Free ShippingFiltrete
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16 x 20 x 1 Standard Pleated Air Filter FPR 5, 3-Pack, Air Filters Replacement
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AprilAire 413 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 16x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Filterbuy 20x20x2 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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Lennox X6670 - (2-Pack) Healthy Climate 16" x 25" x 5" OEM HCF16-11 Air Filter, MERV 11Lennox
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Filterbuy 20x24x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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23% OffFilterbuy 20x25x5 Air Filter MERV 8 (MPR 700) Dust Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38)Filterbuy
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AprilAire 410 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 16x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell & AprilAire Space-Gard, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.88 x 24.63 x 4.31)Filtrete
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CoreCarbon 20x30x1 Cut To Fit Furnace & Air Conditioner Washable Reusable High Air Flow Polyester Fiber Filter Media (20" x 30" x .75" actual)Free ShippingCoreCarbon
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Filtrete 16x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox & Honeywell Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.88x24.56x4.31 in)Free ShippingFiltrete
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Aerostar 16x25x1 MERV 11 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & SmokeFree ShippingAerostar
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Lennox X6673 Healthy Climate HCF20-11 MERV 11 Filter Media (2 Pack)Lennox
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Filtrete 18x18x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters, WhiteFree ShippingFiltrete
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AprilAire 210 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 20x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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BNX TruFilter 16x20x1 Air Filter MERV 13 (6-Pack) - MADE IN USA - Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Pollen, Mold, Bacteria, Smoke, Allergen, MPR 1900 FPR 10Free ShippingBNX
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FUTURO-48191EN Ultra Performance Knee Stabilizer, Breathable, Large - GrayFree ShippingFiltrete
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26% OffAprilAire 201 Replacement Furnace Filter for AprilAire or Space-Gard 2200 or 2250 Whole-House Air Purifiers - MERV 10, 20x25x6 Air Filter (Pack of 2)Free ShippingAprilaire
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14% OffNordic Pure 16x25x5 (15_3/4 x 24_3/4 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Lennox X6670 MERV 11 Box Replacement Filter also for Honeywell, 16" H x 25" L x 5" W (3-Pack)HEALTHY CLIMATE
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Trion 255649-102 Air Bear 20 x 25 x 5 Inch MERV 8 High Performance Air Purifier Filter Replacement for Air Bear Supreme, Right Angle, and Cub Air Cleaner Purification Systems (3 Pack)Trion
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10% OffFilterbuy 16x25x1 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 15.50 x 24.50 x 0.75)Filterbuy
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Filtrete 20x25x5 AC Furnace Air Filter, MPR 700, MERV 8, Fits Trion Air Bear & Carrier, Dust, Pollen & Pet Dander Reduction, 2-Pack (actual size 19.56 x 24.13 x 4.75 in)Free ShippingFiltrete
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Nordic Pure 20x25x4 (19_1/2 x 24_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Filterbuy 16x25x2 Air Filter MERV 8 (MPR 700) Dust Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 15.50 x 24.50 x 1.75)Filterbuy
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Clean Comfort AMP-11-2025-45 (2-Pack) - 20" x 25" x 4.5" Media Air Filter, MERV 11Clean Comfort
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Honeywell Home 16x25x4 MERV 8, AC Furnace Air Filter, 3 PACK (CF408F1625-3PKAM) (Actual Dimensions: 15.63 x 24.75 x 4.38 in.)Free ShippingHoneywell Home
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X6670 Lennox OEM Merv 11 Filter Media 16"X25"X5" Fits X6660 HCC16-28 Genuine Lennox X6670 (2 X Pack of 2)Lennox
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Lennox Carbon Coated X6672 Healthy Climate MERV 16 FilterHealthy Climate
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29% OffFiltrete 20x25x4 Furnace Air Filter MPR 1550 DP MERV 12 Slim Fit, Healthy Living Ultra Allergen Deep Pleat, 2-Pack, Fits Lennox & Honeywell Devices (exact dimensions 19.5 x 24.5 x 3.75)Filtrete
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Honeywell FC100A1029 16 x 25 x 4 Media Air Filter (MERV 11)Free ShippingHoneywell
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Lennox Healthy Climate Lennox X6672 16x25x5 Healthy Climate Carbon-Clean MERV 16 Filter Bundle with Same Day Supply Filter Change Reminder Magnet (2-Pack) 2 Count (Pack of 1)Lennox
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Nordic Pure 16x25x4 (15_1/2 x 24_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Clean Comfort AMP-11-1625-45 (2-Pack) - 16" x 25" x 4.5" Media Air Filter, MERV 11Clean Comfort
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11% OffHoneywell Home 20x25x4 MERV 8, AC Furnace Air Filter, 3 PACK (CF100A1025-3PKAM) (Actual Dimensions: 19.94 x 24.87 x 4.38 in.)Free ShippingHoneywell Home
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Furnace Filters 16x25x4 - HVAC Air Filter Replacement FC100A1029 Merv 11 with Homequip Easy Disposal Bag (2 Pack)Homequip
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Clean Comfort AMP-M1-1056 (2-Pack) - 16" x 25" x 5" Media Air Filter, MERV 11Clean Comfort
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Trion Air Bear 255649-105 (2-Pack) – 16” x 25” x 5” Pleated Air Filter, MERV 8Air Bear
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Honeywell 16x20x4 AC Furnace Air Filter Replacement - FC100A1003 HVAC Furnace Filters Merv 11 Filter Media, AC Filter with Homequip Disposal Bag, 2-Pack (Actual Size: 15.94 x 19.75 x 4.38 Inches)Honeywell
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Lennox X7935 20x20x5 Healthy Climate Carbon-Clean MERV 16 Filter Bundle with Same Day Supply Filter Change Reminder Magnet (1-Pack)Lennox
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28% OffAprilAire 416 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 16, Allergy, Asthma, & Virus, 16x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Filtrete 20x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6 Pack (Actual Size 19.69 x 24.69 x 0.81 in)Free ShippingFiltrete
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Carrier & Bryant EXPXXFIL0016 (2-Pack) - 16" x 25" x 5" EZ Flex Air Filter, MERV 10Free ShippingBryant
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True Blue Replacement Air Filter for Aprilaire 2200 Series Air Cleaner,MERV 13Free ShippingTrue Blue
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12% OffHoneywell FC100A1037 20"x4"x25" Merv 11 Filter Media, Pack of 5Honeywell
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15% OffAprilAire 310 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 20x20x4 Air Filter (Pack of 1)Free ShippingAprilaire
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14% OffNordic Pure 20x25x5 (19_7/8 x 24_7/8 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Genuine Carrier Part # GAPCCCAR1625 Size 24 1/2 x 17 1/16 x 3 9/16 MERV 15 by CarrierFree ShippingCarrier
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AprilAire 401 Replacement Furnace Filter for AprilAire 2400, Space-Gard 2400 Whole-House Air Purifiers - MERV 10, 16x25x6 Air Filter (Pack of 1)Free ShippingAprilaire
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Lennox Carbon Coated X6672 Healthy Climate MERV 16 Filter (2 Pack)Lennox
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AprilAire 501 Replacement Filter for AprilAire 5000 Whole-House Air Purifier - MERV 15 Equivalent, 16x25x6 Air Filter (Pack of 1)Free ShippingAprilaire
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Trion 3 Pack Pleated Air Filter, Air Bear MERV 11 for HVAC/Furnace, 20x25x5 in.Trion
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16% OffAprilAire 313 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 20x20x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Nordic Pure 18x25x1 (17 1/2 x 24 1/2 x 3/4) Pleated MERV 8 Air Filters 6 PackFree ShippingNordic Pure
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Filtrete 16x25x1 AC Furnace Air Filter, MERV 13, MPR 1900, Premium Allergen, Bacteria&Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.719x24.72x0.78 in)Free ShippingFiltrete
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Filtrete 16x20x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 15.688 x 19.688 x 0.78 in)Free ShippingFiltrete
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Nordic Pure 16x20x4 (15_1/2 x 19_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Trion Air Bear 255649-102 (2-Pack) - 20" x 25" x 5" Pleated Air Filter, MERV 8Trion
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Trion Air Bear 255649-102 (2-Pack) - 20" x 25" x 5" Pleated Air Filter, MERV 8Trion
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Nordic Pure 16x25x1 (15 1/2 x 24 1/2 x 3/4) Pleated MERV 12 Air Filters 6 PackFree ShippingNordic Pure
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Aerostar 20x25x1 MERV 13 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Bacteria, Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog, Smoke & VirusesFree ShippingAerostar
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GeneralAire Pleated Media filter 12758 General 3-PACK SPECIAL-For AC-1, #4001GeneralAire
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Honeywell FC100A1029-5pk 16" x 25" Media Air Filter, Merv 11 (Pack of 5)Honeywell
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Filtrete 20x25x4(SlimFit), AC Furnace Air Filter, MPR 1550 DP, Healthy Living Ultra Allergen Deep Pleat, 4-Pack, Fits Lennox & Honeywell Devices (exact dimensions 19.5 x 24.5 x 3.75)Filtrete
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Filterbuy 16x25x5 Air Filter MERV 11 (MPR 1200) Allergen Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1029, Lennox X6670, Carrier, & More (Actual Size: 15.75 x 24.75 x 4.38)Filterbuy
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CoreCarbon Natural Fiber Hog Hair Furnace Door Filter for Mobile, Manufactured and Modular Homes (19-1/2 x 28)Free ShippingCoreCarbon
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Nordic Pure 16x25x2 (15 1/2 x 24 1/2 x 1 3/4) Pleated MERV 12 Air Filters 3 PackFree ShippingNordic Pure
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24% OffFiltrete 16x24x1 AC Furnace Air Filter, MERV 12, MPR 1500, CERTIFIED asthma & allergy friendly, 3 Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.81x23.81x0.78 in)Free ShippingFiltrete
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Lennox Healthy Climate Lennox X6675 20x25x5 Healthy Climate Carbon-Clean MERV 16 Filter Bundle with Same Day Supply Filter Change Reminder Magnet (1-Pack)Lennox
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26% OffHoneywell FC100A1037-5 20" x 25" Merv 11 Filter Media (Pack of 5)Honeywell
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14% OffGenuine M1-1056 Size 16" x 25" x 5" (Actual Size: 15 3/8" x 25 1/2" x 5 1/4") MERV 11 PACK OF 2 FILTERS…Goodman
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24% OffFiltrete 20x25x4(SlimFit), AC Furnace Air Filter, MPR 1550 DP, Healthy Living Ultra Allergen Deep Pleat, 2-Pack, Fits Lennox & Honeywell Devices (exact dimensions 19.5 x 24.5 x 3.75)Filtrete
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Bryant/Carrier FBA_EXPXXFIL0016 Humidifier Filter, 1 Count (Pack of 2)Bryant/Carrier
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Filterbuy 20x25x5 Air Filter MERV 11 (MPR 1200) Allergen Defense (4-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38)Filterbuy
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Filtrete 20x20x1 Air Filter, MPR 2800, MERV 14, Healthy Living Ultrafine Particle Reduction 3-Month Pleated 1-Inch Air Filters, 2 FiltersFree ShippingFiltrete
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Lennox X6673 MERV 11 Filter Media 25 x 20 x 5 InchLennox
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Lennox Model X0585 Air Cleaner Filter Media - 20 x 20 x 5Lennox
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Filterbuy 20x25x5 Air Filter MERV 13 (MPR 1900) Health Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38)Filterbuy
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Filtrete 20x25x4, AC Furnace Air Filter, MPR 1550 DP, Healthy Living Ultra Allergen Deep Pleat, 2-Pack (Actual 19.88 x 24.63 x 4.31)Filtrete
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10% Off3 Trion Air Bear 20x25x5 Genuine Air Cleaner FiltersTrion
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20x25x4 Furnace Filters, FC100A1037 Filter Replacement, Merv 11 Filter Media with Homequip Disposal Bag (2 Pack)Homequip
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Honeywell FC100A1029 Air Filter - 16x25x4 - 2-PackHoneywell
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BestAir HW1625-11R AC Furnace Air Filter, 16" x 25" x 4", MERV 11, Removes Allergens & Contaminants, Fits 100%, For Honeywell Models, Pack of 3Free ShippingBestAir
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Filtrete 16x25x5 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & Trion AirBear, CERTIFIED Asthma & Allergy Friendly, Electrostatic Air Filter, 1-Pack (actual size 15.75 x 24.13 x 4.88)Free ShippingFiltrete
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15% OffAprilAire 216 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 16, Allergy, Asthma, & Virus, 20x25x4 Air Filter (Pack of 2)Free ShippingAprilaire
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259112-105 16x25x5 Trion Air Bear Supreme 1400 MERV 11 Media FilterTrion
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Filterbuy 20x25x4 Air Filter MERV 11 (MPR 1200) Allergen Defense Replacement (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)Filterbuy
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Honeywell FC100A1011 20 x 20 x 4 replacement media air furnace filterFree ShippingHoneywell Home
115 Furnace Filters deals are available from:
Amazon, eBay stores, starting from $15.29.
The biggest discount we found is 35% on Filtrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 15.719 x 24.72 x 0.84 in) at Amazon.
The lowest price we found is $15.29 while the highest is $186.99.
Prices for the best Furnace Filters deals average at $64.39.
Last updated on October 27, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Furnace Filters.