Best furnace filters Deals Online in the US
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19% OffSimply 16x25x1 Air Filter, MERV 8, MPR 600, 6 Pack, For Home AC Furnace & HVAC (Actual Size: 15.75"x24.75"x0.75") DUST, Pet, & Allergy ControlFree ShippingSimply 
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
Filterbuy 20x20x2 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)- Best Value
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 
PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust Electronic
Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 0.75 Inches)Filterbuy
10% OffFilterbuy 16x25x4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 3.63 Inches)Filterbuy-
10% OffTrion Air Bear 255649-102 (3 Pack) Pleated Furnace Air Filter 20"x25"x5" MERV 8
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Amazon Basics 16x25x1 Air Filter 6 Pack, MERV 11 AC Furnace Filters (Actual Size: 15.75" x 24.75" x 0.75")Free ShippingAmazon Basics
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Filterbuy 16x25x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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23% OffAerostar 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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20% OffFiltrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, Allergen, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.88 x 24.63 x 4.31)Free ShippingFiltrete
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Pleated Air Filters MERV 8 HVAC Vent Furnace 20x25x1 Replacement Filter 3 Pack
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32% OffFilterbuy 20x25x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38 Inches)Filterbuy
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20X20X1 Pleated Air Filters Replacement For Furnace. MERV 8 AC HVAC FPR 5 3-Pack
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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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20X20X1 Pleated Air Filters Replacement For Furnace. MERV 8 AC HVAC FPR 5 3-Pack
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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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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
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12% OffAerostar 20x20x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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Filterbuy 20x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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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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Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack
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Filtrete 16x25x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 2 FiltersFree ShippingFiltrete
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3-Pack Standard Pleated Air Filter 20x25x1, Air Filters Replacement FPR 5 MERV 8
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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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15x20x1 Air Filter Standard Pleated Furnace AC (3-Pack) MERV 8 FPR 5
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28% OffFiltrete 20x20x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 19.719 x 19.719 x 0.84 in)Free ShippingFiltrete
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Filtrete Air-Filter Basic Pleated Furnace Replacement Pad Dust Pack Lot 3M 6 12
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Filtrete 16x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox & Honeywell Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 4-Pack (actual size 15.88 x 24.56 x 4.31)Free ShippingFiltrete
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Filterbuy 20x30x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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30% OffFiltrete 20x25x1 AC Furnace Air Filter, MERV 14, MPR 2500, High Performance Premium Allergen, Ultrafine Particles, Bacteria & Virus Filter, CERTIFIED Asthma & Allergy Friendly, 4-PackFree ShippingFiltrete
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Filterbuy 20x24x1 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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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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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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X6673 Lennox 20x25x5 Merv 11 Filter Media 2 PackLennox
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AprilAire 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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11% OffFiltrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6 Pack (Actual Size 15.69 x 24.69 x 0.81 in)Free ShippingFiltrete
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Lennox Carbon Coated X6672 Healthy Climate MERV 16 Filter (2 Pack)Lennox
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Filtrete 16x25x1 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 15.69 x 24.69 x 0.78 in)Free ShippingFiltrete
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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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BNX TruFilter 20x20x1 MERV 13 (4-Pack) AC Furnace Air Filter - MADE IN USA - Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters - Removes Pollen, Mold, Bacteria, SmokeFree ShippingBNX
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Filterbuy 20x25x4 Air Filter MERV 13 Optimal Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 3.63 Inches)Filterbuy
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Filtrete 14x25x1 AC Furnace Air Filter, MERV 12, MPR 1500, CERTIFIED asthma & allergy friendly, 3 Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 13.81x24.81x0.78 in)Free ShippingFiltrete
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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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17% 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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Trion Air Bear 255649-102 (2-Pack) - 20" x 25" x 5" Pleated Air Filter, MERV 8Trion
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Trion 3 Pack Pleated Air Filter, Air Bear MERV 11 for HVAC/Furnace, 20x25x5 in.Trion
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Filterbuy 16x25x4 Air Filter MERV 11 Allergen Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 3.63 Inches)Filterbuy
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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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Honeywell POPUP2200, 20 x 25 x 6 inches - MERV 11 Replacement Filter for Aprilaire, Space-GardFree ShippingHoneywell Home
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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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Filterbuy 20x20x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 19.50 x 0.75 Inches)Filterbuy
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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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AprilAire 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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RayAir Supply 16x25 Replacement Filter Pads Compatible with Dynamic Air Cleaner 16X25 Refill (3 Pack) White, Made in USAFree ShippingRAYAIR SUPPLY
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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 16x25x5 Air Filter MERV 11 Allergen Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1029, Lennox X6670, Carrier, & More (Actual Size: 15.75 x 24.75 x 4.38 Inches)Filterbuy
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13% OffFilterbuy 20x25x4 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 3.63 Inches)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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AprilAire 110 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 16x20x4 Air Filter (Pack of 1)Free ShippingAprilaire
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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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Lennox Healthy Climate Lennox X6672 16x25x5 Healthy Climate Carbon-Clean MERV 16 Filter Bundle with Same Day Supply Filter Change ReminderLennox
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12% OffTrion 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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Honeywell FC100A1029 16 x 25 x 4 Media Air Filter (MERV 11)Free ShippingHoneywell
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Honeywell Home 20x25x4 MERV 12, AC Furnace Air Filter, 3 PACK (CF200A1016-3PKAM) (Actual Dimensions: 19.9 x 24.9 x 4.38 in.)Free ShippingHoneywell Home
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AprilAire 216 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 16, Allergy, Asthma, & Virus, 20x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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23% OffFiltrete 16x25x1 Air Filter, MPR 2800, MERV 14, Healthy Living Ultrafine Particle Reduction 3-Month Pleated 1-Inch Air Filters, 2 Filters, WhiteFree ShippingFiltrete
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Filterbuy 16x25x5 Air Filter MERV 13 Optimal Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1029, Lennox X6670, Carrier, & More (Actual Size: 15.75 x 24.75 x 4.38 Inches)Filterbuy
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BNX TruFilter 20x25x1 Air Filter MERV 8 (6-Pack) - MADE IN USA – Dust & Pet Defense Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Dust, Pet, Mold, Pollen MPR 600 – 700 & FPR 5Free ShippingBNX
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10% OffAerostar 18x20x1 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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18% OffAprilAire 416 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 16, Allergy, Asthma, & Virus, 16x25x4 Air Filter (Pack of 2)Free ShippingAprilaire
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Nordic 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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Filterbuy 20x25x5 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38 Inches)Filterbuy
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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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BNX TruFilter 14x20x1 Air Filter MERV 11 (6-Pack) - MADE IN USA - Allergen Defense Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Dust, Pet, Smoke, Allergy MPR 1200 FPR 7Free ShippingBNX
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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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Filterbuy 16x25x5 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1029, Lennox X6670, Carrier, & More (Actual Size: 15.75 x 24.75 x 4.38 Inches)Filterbuy
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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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Aerostar 20x25x4 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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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 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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Filtrete 16x25x1 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 15.69 x 24.69 x 1.56 in)Free ShippingFiltrete
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Filterbuy 20x25x1 Air Filter MERV 8 Dust Defense (12-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 0.75 Inches)Filterbuy
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Filtrete 16x25x1 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 15.69 x 24.69 x 1.56 in)Free ShippingFiltrete
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Glasfloss 20x20x2 MERV 10 Furnace Filter (12 Pack)Glasfloss
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Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackFree ShippingNordic Pure
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Filtrete 20x20x1 AC Furnace Air Filter, MERV 13, MPR 1900, Premium Allergen, Bacteria & Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 19.69x19.69x0.78 in)Free ShippingFiltrete
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11% OffNordic 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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Honeywell POPUP2200, 20 x 25 x 6 inches - MERV 11 Replacement Filter for Aprilaire, Space-Gard (2-Pack)Free ShippingHoneywell
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AprilAire 413CBN Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13 with Carbon, Healthy Home Allergy + Odor Reduction, 16x25x4 Air Filter (Pack of 1)Free ShippingAprilaire
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Nordic Pure 20x20x5 (19_5/8 x 19_7/8 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filter 1 PackFree ShippingNordic Pure
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Trion Air Bear 255649-105 (2-Pack) – 16” x 25” x 5” Pleated Air Filter, MERV 8Trion
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Aerostar 16x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual size 15 3/4"x 19 3/4" x 3/4")Free ShippingAerostar
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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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Aerostar 19.875x21.5x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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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 2)Free ShippingAprilaire
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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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16% OffHoneywell Home 16x25x4 MERV 8, AC Furnace Air Filter, 1 PACK (CF408F1625-1PKAM)(Actual Dimensions: 15.63 x 24.75 x 4.38 in.) 1 FilterFree ShippingHoneywell Home
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Simply 16x25x1 Air Filter, Merv 13, MPR 1500, 6 Pack, For Home AC Furnace & HVAC (Actual Size: 15.75"x24.75"x0.75") DUST, Pet, & Allergy ControlFree ShippingSimply
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Furnace Filters 16x25x4 - HVAC Air Filter Replacement FC100A1029 Merv 11 with Homequip Easy Disposal Bag (1 Pack)Homequip
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Filtrete 16x20x1 AC Furnace Air Filter, MERV 13, MPR 2200, Elite Allergen, Bacteria & Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.69x19.69x0.78 in)Free ShippingFiltrete
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24% OffHoneywell Home AC Furnace Media Air Filter 16 x 20 x 4 MERV 11 (1 pk)Honeywell Home
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Filterbuy 20x25x1 Air Filter MERV 8 Dust Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 0.75 Inches)Filterbuy
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Filterbuy 20x25x1 Air Filter MERV 8 Dust Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 0.75 Inches)Filterbuy
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Lennox X0445 MERV 10 Filter for PMAC-20C - 25" x 20" x 6" - Genuine Lennox ProductLenox
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17% OffAerostar 12x12x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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Nordic Pure 20x25x2 (19 1/2 x 24 1/2 x 1 3/4) Pleated MERV 12 Air Filters 3 PackFree ShippingNordic Pure
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22% OffFiltrete 20x25x4 Slim Fit (3.75" width), AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell Devices, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.50 x 24.50 x 3.75)Filtrete
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Filterbuy 16x25x1 Air Filter MERV 11 Allergen Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 0.75 Inches)Filterbuy
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Glasfloss 20x25x2 MERV 10 Furnace Filter (12 Pack)Glasfloss
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Filterbuy 16x25x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 0.75 Inches)Filterbuy
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EconoHome 16x25x4 AC Furnace Pleated Air Filter MERV 11 Replacement – Allergen Defense, 2 Pack, Fits Lennox (X6670), Honeywell (FC100A1029) filters. (Actual size: 15.94 x 24.86 x 4.36 Inches)EconoHome
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Honeywell Home AC Furnace Media Air Filter 20 x 25 x 4 MERV 11 (1 pk)Free ShippingHONEYWELL
115 Furnace Filters deals are available from:
Amazon, eBay stores, starting from $11.99.
The biggest discount we found is 32% on Filterbuy 20x25x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38 Inches) at Amazon.
The lowest price we found is $11.99 while the highest is $180.00.
Prices for the best Furnace Filters deals average at $57.09.
Last updated on August 29, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Furnace Filters.