10 bestPermanent Furnace Filtersof January 2026

112M consumers helped this year.

1

Filtrete 16x20x1 Furnace Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters

Filtrete 16x20x1 Furnace Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters

Filtrete 16x20x1 Furnace Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters

Filtrete

9.7

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2

Demiwise 20x25x5 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x24.72"x4.33")

Demiwise 20x25x5 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x24.72"x4.33")

Demiwise 20x25x5 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x24.72"x4.33")

Demiwise

9.4

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3

29-3/4 x 35-3/4 x 1 (Exact Size) BioAir Electrostatic Washable Permanent A/C Furnace Filter - DESIGNED FOR GEOTHERMAL UNITS - Save $$$ - Just Vacuum or Hose Off and Reuse - 29.75x35.75x1

29-3/4 x 35-3/4 x 1 (Exact Size) BioAir Electrostatic Washable Permanent A/C Furnace Filter - DESIGNED FOR GEOTHERMAL UNITS - Save $$$ - Just Vacuum or Hose Off and Reuse - 29.75x35.75x1

29-3/4 x 35-3/4 x 1 (Exact Size) BioAir Electrostatic Washable Permanent A/C Furnace Filter - DESIGNED FOR GEOTHERMAL UNITS - Save $$$ - Just Vacuum or Hose Off and Reuse - 29.75x35.75x1

BioAir

9.2

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4

Trophy Air | Merv 8 | Washable Furnace Filter | Lifetime HVAC & Furnace Air Filter | Washable | Superior particle-holding Ability | Premium Quality Aluminum | 16x25x1

Trophy Air | Merv 8 | Washable Furnace Filter | Lifetime HVAC & Furnace Air Filter | Washable | Superior particle-holding Ability | Premium Quality Aluminum | 16x25x1

Trophy Air | Merv 8 | Washable Furnace Filter | Lifetime HVAC & Furnace Air Filter | Washable | Superior particle-holding Ability | Premium Quality Aluminum | 16x25x1

Trophy Air

8.9

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5

16x25x1 Dust Eater Furnace Filter | Permanent | Washable | Reusable | Electrostatic | Made in Canada

16x25x1 Dust Eater Furnace Filter | Permanent | Washable | Reusable | Electrostatic | Made in Canada

16x25x1 Dust Eater Furnace Filter | Permanent | Washable | Reusable | Electrostatic | Made in Canada

Dust Eater

8.6

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OtherRelated productsUp to 19% off

CoreCarbon Hog Hair Furnace Door Filter for Mobile, Manufactured and Modular Homes (19-1/2 x 28)

CoreCarbon Hog Hair Furnace Door Filter for Mobile, Manufactured and Modular Homes (19-1/2 x 28)

20x20x1 Air Filter by ElectroDust - Furnace Filter, Air Filters for Home. Perfect Air Conditioner Filter. Great HVAC filter, AC filter | Reusable air filter - Washable air filter

20x20x1 Air Filter by ElectroDust - Furnace Filter, Air Filters for Home. Perfect Air Conditioner Filter. Great HVAC filter, AC filter | Reusable air filter - Washable air filter

16-3/8 x 21-1/2 x 1 Electrostatic Washable Permanent A/C Furnace Air Filter 16-3/8x21-1/2x1

16-3/8 x 21-1/2 x 1 Electrostatic Washable Permanent A/C Furnace Air Filter 16-3/8x21-1/2x1

K&N 16x20x1 HVAC Furnace Air Filter, Lasts a Lifetime, Washable, Merv 11, the Last HVAC Filter You Will Ever Buy, Breathe Safely at Home or in the Office, HVC-11620

K&N 16x20x1 HVAC Furnace Air Filter, Lasts a Lifetime, Washable, Merv 11, the Last HVAC Filter You Will Ever Buy, Breathe Safely at Home or in the Office, HVC-11620

6

Venti Tech 16x25x1 Washable Electrostatic Air Filter. Reusable HVAC & Furnace Air Filter

Venti Tech 16x25x1 Washable Electrostatic Air Filter. Reusable HVAC & Furnace Air Filter

Venti Tech 16x25x1 Washable Electrostatic Air Filter. Reusable HVAC & Furnace Air Filter

Venti Tech

8.3

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7

Demiwise 16x25x5 MERV 8 Electrostatic Air Filter, Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise 16x25x5 MERV 8 Electrostatic Air Filter, Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise 16x25x5 MERV 8 Electrostatic Air Filter, Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise

8.0

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8

Demiwise 16x25x1 Electrostatic Air Filter, MERV 8 Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise 16x25x1 Electrostatic Air Filter, MERV 8 Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise 16x25x1 Electrostatic Air Filter, MERV 8 Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office Environment

Demiwise

7.7

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9

Demiwise 20x20x4 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x19.76"x3.58")

Demiwise 20x20x4 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x19.76"x3.58")

Demiwise 20x20x4 Washable Electrostatic Air Filter, MERV 8 Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Increases Airflow（Actual Size:19.76"x19.76"x3.58")

Demiwise

7.4

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15% off

10

AirThreds 16x25x1 Air Filter for AC HVAC Furnace, Machine Washable & Dryer Friendly MREV 8 Plus Reusable Air Filters

AirThreds 16x25x1 Air Filter for AC HVAC Furnace, Machine Washable & Dryer Friendly MREV 8 Plus Reusable Air Filters

AirThreds 16x25x1 Air Filter for AC HVAC Furnace, Machine Washable & Dryer Friendly MREV 8 Plus Reusable Air Filters

AirThreds

7.1

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