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23% OffFilterbuy 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 
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- Best Value
18% OffAerostar 16x25x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar 
Filterbuy 20x25x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
Aerostar 20x20x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
AprilAire 413 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 16x25x4 Air Filter (Pack of 1)Free ShippingAprilaire-
Aerostar 16x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
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Amazon Basics 14x20x1 Air Filter 6 Pack, Merv 8 AC Furnace FiltersFree ShippingAmazon Basics
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Filterbuy 20x25x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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22% OffFiltrete 16x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, Allergen, Electrostatic Air Cleaning Filter, 2-Pack (actual size 15.88 x 24.56 x 4.31)Free ShippingFiltrete
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32% OffFiltrete 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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Pleated Air Filters MERV 8 HVAC Vent Furnace 20x25x1 Replacement Filter 3 Pack
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23% 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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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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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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Permanent Washable Electrostatic Furnace Ac Air Filter Replacement Multi Sizes
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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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Kirkland Signature 2200 High Performance Furnace Filters 4 Pack 20x25x1"
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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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20X20X1 Pleated Air Filters Replacement For Furnace. MERV 8 AC HVAC FPR 5 3-Pack
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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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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
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17% 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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3 Pack 213 210 MERV-13 Furnace Air Filters 20x25x4
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X6673 Lennox 20x25x5 Merv 11 Filter Media 2 PackLennox
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Trion Air Bear 255649-102 (3 Pack) Pleated Furnace Air Filter 20"x25"x5" MERV 8
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15% OffSimply 16x24x1 Air Filter, Merv 8, MPR 600, 6 Pack, Furnace Air Filter for HVAC (Actual Size: 15.75"x23.75"x0.75") DUST, Pet, & Allergy ControlFree ShippingSimply
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Filterbuy 16x25x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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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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Furnace AC Air Filter MERV 13, 20" x 25" x 1" (Pack of 6)
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Filtrete 20x25x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 2 FiltersFree ShippingFiltrete
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AprilAire 410 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 16x25x4 Air Filter (Pack of 2)Free ShippingAprilaire
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11% OffFilterbuy 16x25x1 Air Filter MERV 8 Dust 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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Lennox X6670 - (2-Pack) Healthy Climate 16" x 25" x 5" OEM HCF16-11 Air Filter, MERV 11Lennox
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Filtrete 16x25x5 AC Furnace Air Filter, MPR 1550, MERV 12, Fit Trion Air Bear Furnace, Allergen, Bacteria & Virus, Electrostatic Air Cleaning Filter, 1-Pack (actual size 15.75 x 24.13 x 4.88)Free ShippingFiltrete
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25% 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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Filtrete 20x25x1 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 19.880 x 25.563 x 0.8125 in )Free ShippingFiltrete
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Aerostar 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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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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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 Healthy Climate Lennox X6672 16x25x5 Healthy Climate Carbon-Clean MERV 16 Filter Bundle with Same Day Supply Filter Change ReminderLennox
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21% OffFiltrete 14x20x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4 Pack (Actual Size 13.81x19.81x0.81 in)Free ShippingFiltrete
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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)Filtrete
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Filterbuy 16x20x4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 19.50 x 3.63 Inches)Filterbuy
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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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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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Colorfil 16x20x1 Air Filter (2-Pack) | Made in the USA | Color Changing | Remove Cat and Dog Odor | MERV 8 for Pet Hair Dander and Dust | 15.5"x19.5"x0.75" Exact SizeFree ShippingColorfil
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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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11% OffBestAir 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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Aerostar 16x25x4 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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AprilAire 413CBN Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13 with Carbon, Healthy Home Allergy + Odor Reduction, 16x25x4 Air Filter (Pack of 2)Free ShippingAprilaire
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12% OffHoneywell FC100A1037 20"x4"x25" Merv 11 Filter Media, Pack of 5Honeywell
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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)Free ShippingFiltrete
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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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Filterbuy 20x25x6 Air Filter MERV 11 Allergen Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Aprilaire Space-Gard 201/2200 / 2250 & Lennox (Actual Size: 19.75 x 24.25 x 6.00 Inches)Filterbuy
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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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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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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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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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Furnace Filters 16x25x4 - HVAC Air Filter Replacement FC100A1029 Merv 11 with Homequip Easy Disposal Bag (2 Pack)Homequip
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Aerostar 16.375x21.5x1 MERV 11 - 4 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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GeneralAire # 4541 MERV 11 for # GF 4511 ReservePro 16x25x5 furnace filter, Actual Size:15 5/8" x 24 3/16" x 4 15/16" Case of 2 FiltersGeneralAire
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Aerostar 16x24x1 MERV 8 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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Aerostar 20x25x4 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenAerostar
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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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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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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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Aerostar 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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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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Filtrete 14x20x1 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 13.81x19.81x0.78 in)Free ShippingFiltrete
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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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Frigidaire PureAir® 20x25x1 MERV 8 Allergen Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters - 6 Pack (exact dimensions 19.81 X 24.81 X 0.81)Free ShippingFrigidaire
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12% OffSimply 18x20x1 Air Filter, Merv 11, MPR 1000, 6 Pack, For Home AC Furnace & HVAC (Actual Size: 17.75"x19.75"x0.75") DUST, Pet, & Allergy ControlFree ShippingSimply
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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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Trion 255649-105 Air Bear MERV 8 High-Performance Pleated Air Purifier Furnace Filter, Cleaner Purification Systems, 16 by 25 by 5 Inches (3 Pack)Trion
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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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Trion Air Bear 255649-105 (2-Pack) – 16” x 25” x 5” Pleated Air Filter, MERV 8Trion
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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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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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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 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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14% OffAerostar 14x20x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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12% OffAIRx ALLERGY 16x20x1 MERV 11 Pleated Air Filter - Made in the USA - Box of 6AIRx Filters
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33% OffFilterbuy 16x25x4 Air Filter MERV 13 Optimal 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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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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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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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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BNX TruFilter 16x25x1 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 19.875x21.5x1 MERV 8 - 4 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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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 (2-Pack) 2 Count (Pack of 1)Lennox
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20% 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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Bryant / Carrier Genuine OEM EZ-FLEX Filter EXPXXFIL0024 (MERV 10)Free ShippingBryant/Carrier
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Bryant / Carrier Genuine OEM EZ-FLEX Filter EXPXXFIL0024 (MERV 10)Free ShippingBryant/Carrier
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Aerostar 20x25x1 MERV 8 - 6 Count - High Efficiency Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Lint, Mold & Allergy-Causing PollenFree ShippingAerostar
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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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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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37% OffFiltrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, Allergen, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31)Filtrete
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20% OffFiltrete 16x25x1 AC Furnace Air Filter, MERV 12, MPR 1500, CERTIFIED asthma & allergy friendly, 3 Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6-Pack (Actual Size 15.69x24.69x0.78 in)Free ShippingFiltrete
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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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Nordic Pure 20x30x1 (19 5/8 x 29 5/8 x 3/4) Pleated MERV 12 Air Filters 6 PackFree ShippingNordic Pure
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Nordic Pure 16x20x1 (15 1/2 x 19 1/2 x 3/4) Pleated MERV 12 Air Filters 6 PackFree ShippingNordic Pure
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14% OffFiltrete 16x25x1 AC Furnace Air Filter, MERV 13, MPR 2200, Elite Allergen, Bacteria & Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6-Pack (Actual Size 15.69x24.69x0.78 in)Filtrete
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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 FC100A1029 Air Filter - 16x25x4 - 2-PackHoneywell
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Lennox X7935 Carbon Clean Healthy Climate MERV 16 Filter (2 Pack)HEALTHY CLIMATE
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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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Filtrete NADP03-2PK-2 08189005996 MPR 1000 20 x 25 x 4 (4-3/8 Actual Depth) Micro Allergen Defense Deep Pleat HVAC Air Filter, Uncompromised Airflow, 2-Pack, 20x25x4, No Color, 2 CountFiltrete
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Lennox X6675 20x25x5 Air Filter, Lennox Healthy Climate Carbon Clean Merv 16 Home Furnace Filter for HVAC system 2 Pack with Cleaning ClothHEALTHY CLIMATE
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FC100A1029-5pk 16" x 25" Media Air Filter (Pack of 5)Honeywell
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11% OffAprilAire 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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GeneralAire # 4541 MERV 11 for # GF 4511 ReservePro 16x25x5 furnace filter, Actual Size:15 5/8" x 24 3/16" x 4 15/16" Case of 3 FiltersGeneralAire
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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
115 Furnace Filters deals are available from:
Amazon, eBay stores, starting from $7.80.
The biggest discount we found is 37% on Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Lennox & Honeywell, Allergen, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31) at Amazon.
The lowest price we found is $7.80 while the highest is $219.99.
Prices for the best Furnace Filters deals average at $63.45.
Last updated on July 2, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Furnace Filters.