Best furnace filters Deals Online in the US
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26% OffFiltrete 16x25x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 4 HVAC Filters (Actual Size 15.68 x 24.68 x 0.81 in)Filtrete 
Filtrete 20x25x5 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 2-Pack, Fits Lennox, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 19.63 x 24.75 x 4.31 in)Filtrete
1 PACK or 3 PACK - Air Filter Standard Pleated FPR 5 Dust Filters Furnace AC- Best Value
24% OffSimply 16x25x1 Air Filter, MERV 8, 6 Pack, For Home AC Furnace & HVAC (Actual Size: 15.75"x24.75"x0.75") DUST, Pet, & Allergy ControlSimply 
PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust Electronic
Aerostar 16x25x1 MERV 8 Air Filter, 6 Count, ACTUAL SIZE (15.75 x 24.75 x 0.75), HVAC, Air Conditioning & Furnace Filter Captures Dust, Lint & Pollen (MPR 600 / FPR 5), Made in USAAerostar
Aerostar 20x20x1 MERV 8 Air Filter, 6 Count, ACTUAL SIZE (19.75 x 19.75 x 0.75), HVAC, Air Conditioning & Furnace Filter Captures Dust, Lint & Pollen (MPR 600 / FPR 5), Made in USAAerostar-
Trion Air Bear 255649-102 (3 Pack) Pleated Furnace Air Filter 20"x25"x5" MERV 8
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21% OffGenuine AprilAire 413 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 16x25x4 Air Filter (Pack of 2)Aprilaire
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Filter King 20x23x1 Air Filter 6-PACK MERV 8 Actual Size 19.5 x 22.5 x .75"
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19% OffFiltrete 20x25x4 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 2-Pack, Fits Honeywell & AprilAire, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 19.88 x 24.63 x 4.31 in)Filtrete
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19% OffFiltrete 20x25x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 19.68 x 24.68 x 0.81 in)Filtrete
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Filterbuy 20x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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Filtrete 16x25x4 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 2-Pack, Fits Lennox & Honeywell, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 15.88x24.56x4.31 in)Filtrete
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20X20X1 Pleated Air Filters Replacement For Furnace. MERV 8 AC HVAC FPR 5 3-Pack
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15% OffFiltrete 20x25x1 Air Filter, MERV 11, MPR 1000, Allergens and Pet Dander, 3-Month AC and Furnace, Cleaner Air, Reliable Airflow, 6 PackFiltrete
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3M FILTRETE BASIC WHITE FLAT PANEL AIR FURNACE FILTER COUNT OF 2,4,8,48 FILTERS
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Filtrete 16x25x5 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 2-Pack, Fits Lennox, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 15.63x24.74x4.31 in)Filtrete
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HDX 20x20x1 Furnace Air Filter 12-Pack Standard Pleated MERV 8 FPR 5 HVAC Filter
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Genuine AprilAire 213 Replacement Filter for AprilAire Whole-House Air Purifiers - MERV 13, Healthy Home Allergy, 20x25x4 Air Filter (Pack of 1)Aprilaire
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Pleated Air Filters MERV 8 HVAC Vent Furnace 20x25x1 Replacement Filter 3 Pack
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10% OffGenuine AprilAire 210 Replacement Filter for AprilAire Whole-House Air Purifiers - MERV 11, Clean Air & Dust, 20x25x4 Air Filter (Pack of 2)Aprilaire
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24X30X1 Pleated Air Filters Replacement For Furnace HVAC AC FPR 5 MERV 8 3-Pack
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Filtrete 16x25x1 Air Filter MERV 5, 6-Pack AC Furnace HVAC, MPR 300 Basic Dust Defense, Pleated Electrostatic, Removes LintFiltrete
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4 Pack 16x20x1 Air Filter MERV 13 Electrostatic Pleated HVAC Furnace Air Filter
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Filtrete 16x25x4 Air Filter MERV 12, MPR 1550 Certified Asthma & Allergy Friendly 2-Pack, Fits Lennox & Honeywell, AC Furnace HVAC Filters, Pleated Electrostatic (Actual Size 15.88x24.56x4.31 in)Filtrete
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Filterbuy 16x25x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
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Amazon Basics 16x25x1 Air Filter 6-Pack, MERV 11 Electrostatic AC Furnace Filters for Allergies, Captures Dust and Pollen (Actual Size: 15.75" x 24.75" x 0.75")Amazon Basics
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20x25x1 Pleated Furnace Air Filter FPR 5 MERV 8 – 12-Pack Standard HVAC
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Filtrete 16x25x4 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 4-Pack, Fits Lennox & Honeywell, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 15.88 x 24.56 x 4.31 in)Filtrete
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Trion Air Bear 259112-102 (3 Pack) Pleated Furnace Air Filter 20"x25"x5" MERV 11
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Filtrete 16x20x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 15.68 x 19.68 x 0.81 in)Filtrete
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Aerostar 16 3/8x21 1/2x1 MERV 11 Furnace Air Filter, 4 Pack
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27% OffFiltrete 20x20x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 4 HVAC Filter (Actual Size 19.68 x 19.68 x 0.81 in)Filtrete
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21% OffGenuine AprilAire 410 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 16x25x4 Air Filter (Pack of 1)Aprilaire
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16% OffFiltrete 20x25x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 4 HVAC Filters (Actual Size 19.68 x 24.68 x 0.81 in)Filtrete
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Filterbuy 16x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 15.50 x 24.50 x 3.63)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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Lennox X6673 Healthy Climate HCF20-11 MERV 11 Filter Media (2 Pack)Lennox
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BNX TruFilter 16x25x1 Air Filter MERV 13 (4-Pack) - MADE IN USA - Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Pollen, Mold, Bacteria, Smoke, Allergen, MPR 1900 FPR 10BNX
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Filterbuy 16x25x5 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1029, Lennox X6670, and More (Actual Size: 15.75 x 24.75 x 4.38)Filterbuy
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BNX TruFilter 20x20x1 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 5BNX
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CoreCarbon 20x30x1 Cut To Fit Furnace & Air Conditioner Washable Reusable High Air Flow Polyester Fiber Filter Media, Made in USA (20" x 30" x .75" actual)CoreCarbon
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24% OffSimply 20x25x4 Air Filter, MERV 8, 4 Pack, Furnace Air Filter for HVAC (Actual Size:19.5"x24.5"x3.63") DUST, Pet, & Allergy ControlSimply
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Honeywell FC100A1029 (2 Pack) - 16" x 25" x 4" Pleated Air Filter, MERV 11 Bundle with Same Day Supply Filter Change ReminderHoneywell
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Filterbuy 20x25x4 Air Filter MERV 11 Superior Pet & 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
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19% OffFiltrete 24x24x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 23.68 x 23.68 x 0.81 in)Filtrete
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Nordic Pure 20x25x4 (19_1/2 x 24_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackNordic Pure
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AprilAire 416 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 16, Allergy, Asthma, & Virus, 16x25x4 Air Filter (Pack of 2)Aprilaire
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Filtrete 20x25x5 Air Filter MERV 12, MPR 1550 Certified Asthma & Allergy Friendly 1-Pack, Fits Trion AirBear, AC Furnace HVAC Filters, Pleated Electrostatic (Actual Size 19.56 x 24.13 x 4.75 in)Filtrete
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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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Honeywell FC100A1037 20"x4"x25" Merv 11 Filter Media, Pack of 5Honeywell
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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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Filterbuy 14x20x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.50 x 19.50 x 0.75)Filterbuy
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Trion Air Bear 259112-102 MERV 11 Filters (3-Pk) - 20x25x5 by TrionTrion
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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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Honeywell FC100A1037 (2 Pack) - 20" x 25" x 4" Pleated Air Filter, MERV 11 Bundle with Same Day Supply Filter Change ReminderHoneywell
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Filterbuy 16x25x5 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1029, Lennox X6670, and More (Actual Size: 15.75 x 24.75 x 4.38)Filterbuy
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Simply 16x25x1 Air Filter, Merv 11, MPR 1000, 6 Pack, Furnace Air Filter for HVAC (Actual Size: 15.75"x24.75"x0.75") DUST, Pet, & Allergy ControlSimply
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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)Aprilaire
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15% OffAprilAire 313 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 20x20x4 Air Filter (Pack of 1)Aprilaire
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Filtrete 20x20x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.88 x 19.88 x 4.31)Filtrete
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M8-1056 20x25x5 (Actual Size: 20-1/4 x 25-3/8 x 5-1/4) Amana & Five Seasons MERV 11 Media Filter (3 Pack)Goodman
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14% OffHoneywell POPUP2200, 20 x 25 x 6 inches - MERV 11 Replacement Filter for Aprilaire, Space-Gard (2-Pack)Honeywell
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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 Filters - MEASURE CAREFULLY BEFORE ORDERING !GeneralAire
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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.)Honeywell Home
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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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Lennox Carbon Coated X6672 Healthy Climate MERV 16 Filter (2 Pack)HEALTHY CLIMATE
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Filtrete 16x25x1 Air Filter, MERV 13 MPR 1900, Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, Cleaner Air Reliable Airflow, 2 HVAC Filters(Act Size 15.62x24.62x0.78 in)Filtrete
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Honeywell FC100A1037-5 20" x 25" Merv 11 Filter Media (Pack of 5)Honeywell
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Trion Air Bear 255649-102 Replacement Filter - 20x25x5, Three Per BoxTrion
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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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Carrier & Bryant EXPXXFIL0016 (2-Pack) - 16" x 25" x 5" EZ Flex Air Filter, MERV 10Bryant
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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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Aerostar 18x20x1 MERV 8 Air Filter, 6 Count, ACTUAL SIZE (17.50 x 19.50 x 0.75), HVAC, Air Conditioning & Furnace Filter Captures Dust, Lint & Pollen (MPR 600 / FPR 5), Made in USAAerostar
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13% OffAprilAire 310 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 20x20x4 Air Filter (Pack of 1)Aprilaire
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Honeywell FC100A1029 16 x 25 x 4 Media Air Filter (MERV 11)Honeywell Home
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Trion Air Bear 255649-101 Pleated Furnace Air Filter 16x25x3 MERV 8 by Trion, 3-PackTrion
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10% OffAprilAire 110 Replacement Filter for AprilAire Whole House Air Purifiers - MERV 11, Clean Air & Dust, 16x20x4 Air Filter (Pack of 1)Aprilaire
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22% OffFiltrete 20x25x4 Slim Fit (3.75" width) AC Furnace Air Filter, MPR 1550, MERV 12, Fits AprilAire & Carrier, CERTIFIED Asthma & Allergy Friendly, 2-Pack (Actual Size 19.50 x 24.50 x 3.75)Filtrete
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Nordic Pure 16x20x4 (15_1/2 x 19_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackNordic Pure
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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.)Honeywell Home
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Lennox X6675 (2-Pack) Carbon Clean 20 x 25 x 5 Inch MERV 16 Efficient Air Filter Replacement for Healthy Climate Air Purifier Cleaner Purification SystemsLennox
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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 PackNordic Pure
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Filterbuy 16x25x5 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1029, Lennox X6670, and More (Actual Size: 15.75 x 24.75 x 4.38)Filterbuy
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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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Nordic Pure 16x25x1 (Actual Size: 15 1/2 x 24 1/2 x 3/4) Pleated MERV 12 Air Filters 6 PackNordic Pure
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Aerostar 20x25x4 MERV 8 Air Filter, 6 Count, ACTUAL SIZE (19.50 x 24.50 x 3.75) HVAC, Furnace Filter for Allergies, Dust, Pet Dander & Smoke (MPR 1500 / FPR 10) Fits Lennox & Honeywell DevicesAerostar
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Honeywell Home 20x25x4 MERV 8, AC Furnace Air Filter, 3 PACK (CF100A1025-3PKAM) (Actual Dimensions: 19.94 x 24.87 x 4.38 in.)Honeywell Home
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Aerostar 20x25x1 MERV 13 Air Filter, 6 Count, ACTUAL SIZE (19.75 x 24.75 x 0.75), HVAC, Air Conditioning & Furnace Filter for Allergies, Dust, Pet Dander & Smoke (MPR 1500 / FPR 10), Made in USAAerostar
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Aerostar 16.375x21.5x1 MERV 11 Air Filter, 4 Count, ACTUAL SIZE (16.50 x 21.50 x 0.75), HVAC, Air Conditioning & Furnace Filter for Dust, Pet Dander, Smoke & Allergies (MPR 1200 / FPR 7), Made in USAAerostar
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Nordic Pure 16x25x4 (15_1/2 x 24_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackNordic Pure
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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 PackNordic Pure
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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, 4-Pack (actual size 15.88 x 24.56 x 4.31)Filtrete
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Aerostar 19.875x21.5x1 MERV 13 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - For Bacteria, Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog, Smoke & VirusesAerostar
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Lennox Carbon Coated X6672 Healthy Climate MERV 16 FilterHEALTHY CLIMATE
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Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 PackNordic Pure
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Filterbuy 20x20x5 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1011, Lennox X0585, and More (Actual Size: 19.63 x 19.88 x 4.38)Filterbuy
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Lennox X8788 MERV 16 Pleated Filter 20" x 26" x 5" Healthy Climate For Lennox PCO20-28HEALTHY CLIMATE
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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)Aprilaire
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Honeywell FC100A1029 Air Filter - 16x25x4 - 2-PackHoneywell
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Honeywell Replacement Media - FC100A1003 - 16" x 4" x 20" - 2-PackHoneywell
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Filtrete 20x36x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6 Pack (Actual Size 19.81x 35.81x0.81 in)Filtrete
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Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters, Lennox Healthy Climate Filter for Home with Cleaning Cloth, 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)HEALTHY CLIMATE
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Glasfloss 20x25x2 MERV 10 Furnace Filter (12 Pack)Glasfloss
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Bryant/Carrier EZ-FLEX Filter Media (expxxfil0020)Bryant/Carrier
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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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GeneralAire Pleated Media filter 12758 General 3-PACK SPECIAL-For AC-1, #4001GeneralAire
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Genuine Electro-Air Part # M1-1056 Size 16" x 25" x 5" (Actual Size: 15 3/8" x 25 1/2" x 5 1/4") MERV 11 Case of 3Five Seasons
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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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X6672 MERV 16 16x25x5 Furnace Filter Compatible with Lennox X6672 for Furnace HVAC System, Part #HCF16-16, 2 PackFoglapius
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Trion 3 Pack Pleated Air Filter, Air Bear MERV 11 for HVAC/Furnace, 20x25x5 in.Trion
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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)Aprilaire
114 Furnace Filters deals are available from:
Amazon, eBay stores, starting from $9.78.
The biggest discount we found is 27% on Filtrete 20x20x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 4 HVAC Filter (Actual Size 19.68 x 19.68 x 0.81 in) at Amazon.
The lowest price we found is $9.78 while the highest is $229.99.
Prices for the best Furnace Filters deals average at $70.50.
Last updated on July 5, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Furnace Filters.