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Shop All Furnace Air Filters20x20x1 Air Filters20x25x1 Air Filters16x20x1 Air Filters16x25x1 Air Filters12x12x1 Air Filters12x24x1 Air Filters14x20x1 Air Filters14x24x1 Air Filters14x25x1 Air Filters18x20x1 Air Filters20x30x1 Air Filters24x24x1 Air FiltersAllergen Air FiltersFiltrete Air FiltersFilterBuy Air FIltersFlanders Air FIltersMERV Rating: 5 to 8MERV Rating: 9 to 12MERV Rating: 13 to 16
20x25x4 Air Filters in Furnace Air Filters(266)
Uses item details. Price when purchased online
Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 3 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches) $49.95
Sponsored
$4995
current price $49.95Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 3 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches)
104.8 out of 5 Stars. 10 reviews
Free shipping, arrives in 3+ days
2 Pack of 20x25x4 MERV 10 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 24-1/2 x 3-3/4 $39.95
Sponsored
$3995
current price $39.952 Pack of 20x25x4 MERV 10 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 24-1/2 x 3-3/4
834.4 out of 5 Stars. 83 reviews
Free shipping, arrives in 3+ days
Best seller SNAPZY 213 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 13 Whole House Furnace Filters 20x25x4, 2-Pack $59.99
Best seller
Sponsored
$5999
current price $59.99SNAPZY 213 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 13 Whole House Furnace Filters 20x25x4, 2-Pack
144.9 out of 5 Stars. 14 reviews
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Free shipping, arrives Wed, Feb 25
Best seller Filtrete 20x25x4 Air Filter, MPR 1000 MERV 11, Allergen Defense, 2 Filters $46.97
Best seller
Sponsored
$4697
current price $46.97Filtrete 20x25x4 Air Filter, MPR 1000 MERV 11, Allergen Defense, 2 Filters
5154.6 out of 5 Stars. 515 reviews
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Free shipping, arrives Wed, Feb 25
Only 3 left
Best seller Filtrete 20x25x4 Air Filter, MPR 1000 MERV 11, Allergen Defense, 2 Filters $46.97
Best seller
$4697
current price $46.97Filtrete 20x25x4 Air Filter, MPR 1000 MERV 11, Allergen Defense, 2 Filters
5154.6 out of 5 Stars. 515 reviews
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Free shipping, arrives Wed, Feb 25
Only 3 left
Overall pick Filtrete 20x25x4 Air Filter, MPR 1550 MERV 12, Ultra Allergen Reduction, 1 Filter $33.88
Overall pick
$3388
current price $33.88Filtrete 20x25x4 Air Filter, MPR 1550 MERV 12, Ultra Allergen Reduction, 1 Filter
10254.6 out of 5 Stars. 1025 reviews
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Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 3 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches) $49.95
$4995
current price $49.95Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 3 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches)
104.8 out of 5 Stars. 10 reviews
Free shipping, arrives in 3+ days
2 Pack of 20x25x4 MERV 10 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 24-1/2 x 3-3/4 $39.95
$3995
current price $39.952 Pack of 20x25x4 MERV 10 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 24-1/2 x 3-3/4
834.4 out of 5 Stars. 83 reviews
Free shipping, arrives in 3+ days
Filterbuy 20x25x4 MERV 8 Dust Defense, Pleated HVAC AC Furnace Air Filters (2-Pack) $45.98
$4598
current price $45.98Filterbuy 20x25x4 MERV 8 Dust Defense, Pleated HVAC AC Furnace Air Filters (2-Pack)
5084.6 out of 5 Stars. 508 reviews
Free shipping, arrives Thu, Feb 26
Honeywell FC100A1037-5 20" x 25" Merv 11 Filter Media (Pack of 5) $124.98
$12498
current price $124.98Honeywell FC100A1037-5 20" x 25" Merv 11 Filter Media (Pack of 5)
314.8 out of 5 Stars. 31 reviews
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Best seller SNAPZY 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 11 Whole House Furnace Filters 20x25x4, 2-Pack $59.99
Best seller
Sponsored
$5999
current price $59.99SNAPZY 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 11 Whole House Furnace Filters 20x25x4, 2-Pack
124.6 out of 5 Stars. 12 reviews
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Free shipping, arrives Wed, Feb 25
20x25x4 MERV 10 Pleated AC Furnace Air Filters by Glasfloss Industries. ( 3 Pack ) Exact Size: 19-1/2 x 24-1/2 x 3-3/4 $49.95
Sponsored
$4995
current price $49.9520x25x4 MERV 10 Pleated AC Furnace Air Filters by Glasfloss Industries. ( 3 Pack ) Exact Size: 19-1/2 x 24-1/2 x 3-3/4
25 out of 5 Stars. 2 reviews
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3M Filtrate Ultra Allergen Reduction Filter Slim Fit 20" x 25" x 4", 2-Pack $46.99
$4699
current price $46.993M Filtrate Ultra Allergen Reduction Filter Slim Fit 20" x 25" x 4", 2-Pack
2544.6 out of 5 Stars. 254 reviews
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BestAir HW2025-11R Honeywell 20x25x4 Series 2000 MERV 11 Furnace Filter $45.54 Was $94.62
Now$4554
current price Now $45.54, Was $94.62$94.62
BestAir HW2025-11R Honeywell 20x25x4 Series 2000 MERV 11 Furnace Filter
374.3 out of 5 Stars. 37 reviews
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Filtrete 20x25x4 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter $39.60
$3960
current price $39.60Filtrete 20x25x4 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
4024.6 out of 5 Stars. 402 reviews
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VEVOR Electrostatic Air Filter, 20x25x4 inch Washable & Reusable Aluminum AC/HVAC Furnace Filter, MERV 8 Long Lifetime, Home or Office (Actual Size: 19.37 x 24.37 x 3.58 in) $59.99
$5999
current price $59.99VEVOR Electrostatic Air Filter, 20x25x4 inch Washable & Reusable Aluminum AC/HVAC Furnace Filter, MERV 8 Long Lifetime, Home or Office (Actual Size: 19.37 x 24.37 x 3.58 in)
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Filtrete 20x20x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 2 Filters $47.89
$4789
current price $47.89Options from $46.97
Filtrete 20x20x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 2 Filters
3444.7 out of 5 Stars. 344 reviews
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Best seller SNAPZY 213 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 13 Whole House Furnace Filters 20x25x4, 2-Pack $59.99
Best seller
$5999
current price $59.99SNAPZY 213 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 13 Whole House Furnace Filters 20x25x4, 2-Pack
144.9 out of 5 Stars. 14 reviews
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Free shipping, arrives Wed, Feb 25
Best seller 213 Replacement Appliance Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 20x25x4 Air Filter (pack of 1) $39.00
Best seller
$3900
current price $39.00213 Replacement Appliance Filter for AprilAire Whole House Air Purifiers - MERV 13, Healthy Home Allergy, 20x25x4 Air Filter (pack of 1)
104.4 out of 5 Stars. 10 reviews
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Clearance Air Filters MERV 13 Electrostatic Pleated HVAC Furnace Filter 4-Pack 20 x 25 x 4, High-Efficiency Multi-Layer Design, Captures Dust, Smoke, Pollen, Pet Dander, Odors, and Fine Airborne Particles $10.99 Was $17.99
Clearance
Now$1099
current price Now $10.99, Was $17.99$17.99
Air Filters MERV 13 Electrostatic Pleated HVAC Furnace Filter 4-Pack 20 x 25 x 4, High-Efficiency Multi-Layer Design, Captures Dust, Smoke, Pollen, Pet Dander, Odors, and Fine Airborne Particles
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Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 2 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches) $39.95
Sponsored
$3995
current price $39.95Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. 2 Pack. (Exact Size: 19.5 x 24.5 x 3.75 Inches)
43 out of 5 Stars. 4 reviews
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Glasfloss ZL 20x25x4 MERV 10 Honeywell FC100A1037 Air Cleaner Filter Replacement. 2 Pack. Exact Size: 20 x 24-7/8 x 4-3/8 $58.95
Sponsored
$5895
current price $58.95Glasfloss ZL 20x25x4 MERV 10 Honeywell FC100A1037 Air Cleaner Filter Replacement. 2 Pack. Exact Size: 20 x 24-7/8 x 4-3/8
Free shipping, arrives in 3+ days
Aerostar 20x25x4 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack $79.96
$7996
current price $79.96Aerostar 20x25x4 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
814.1 out of 5 Stars. 81 reviews
Free shipping, arrives in 3+ days
Best seller SNAPZY 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 11 Whole House Furnace Filters 20x25x4, 2-Pack $59.99
Best seller
$5999
current price $59.99SNAPZY 210 Replacement Filter Compatible with AprilAire Air Purifier Models 1210 1620 2210 2216 3210 4200 2200 Upgrade Kit 1213, Merv 11 Whole House Furnace Filters 20x25x4, 2-Pack
124.6 out of 5 Stars. 12 reviews
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Free shipping, arrives Wed, Feb 25
FC100A1037 Air Filter 20x25x4.5 MERV 11 - Replacement Furnace Filter for HVAC Systems - Dust, Pollen, Pet Dander Reduction $39.01
$3901
current price $39.01FC100A1037 Air Filter 20x25x4.5 MERV 11 - Replacement Furnace Filter for HVAC Systems - Dust, Pollen, Pet Dander Reduction
Free shipping, arrives in 3+ days
Air Filter MERV 10 (4-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (14x20x1 4-Pack), SB12617 $29.99
11 sizes
Available in additional 11 sizes$2999
current price $29.99Options from $29.99 – $64.99
Air Filter MERV 10 (4-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (14x20x1 4-Pack), SB12617
25 out of 5 Stars. 2 reviews
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Clean Comfort AMP-11-2025-45 (2-Pack) - 20" x 25" x 4.5" Media Air Filter, MERV 11 $68.33
$6833
current price $68.33Clean Comfort AMP-11-2025-45 (2-Pack) - 20" x 25" x 4.5" Media Air Filter, MERV 11
94.8 out of 5 Stars. 9 reviews
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20x25x4 Air Filter MERV 8 (2-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (20x25x4 2-Pack) $38.99
$3899
current price $38.9920x25x4 Air Filter MERV 8 (2-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (20x25x4 2-Pack)
Free shipping, arrives in 3+ days
BestAir HW2025-13R Honeywell 20x25x4 Series 3000 MERV 13 Furnace Filter $58.12 Was $84.99
Now$5812
current price Now $58.12, Was $84.99$84.99
BestAir HW2025-13R Honeywell 20x25x4 Series 3000 MERV 13 Furnace Filter
43.3 out of 5 Stars. 4 reviews
Free shipping, arrives in 3+ days
Flash Deal Filterbuy 20x25x4 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (4-Pack) $88.16
Flash Deal
$8816
current price $88.16Filterbuy 20x25x4 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (4-Pack)
514.5 out of 5 Stars. 51 reviews
Free shipping, arrives Thu, Feb 26
Glasfloss ZL 20x25x4 MERV 10 Pleated AC Furnace Air Filters. Box of 4. Exact Size: 19-1/2 x 24-1/2 x 3-3/4 $62.95
Sponsored
$6295
current price $62.95Glasfloss ZL 20x25x4 MERV 10 Pleated AC Furnace Air Filters. Box of 4. Exact Size: 19-1/2 x 24-1/2 x 3-3/4
Free shipping, arrives in 3+ days
Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. Case of 6. (Exact Size: 19.5 x 24.5 x 3.75 Inches) $89.95
Sponsored
$8995
current price $89.95Mann+Hummel 20x25x4 MERV 8 Pleated HVAC AC Furnace Air Filters. Case of 6. (Exact Size: 19.5 x 24.5 x 3.75 Inches)
Free shipping, arrives in 3+ days
20x25x4 MERV 8 Pleated AC Furnace Air Filters. 4 Pack $62.85
$6285
current price $62.8520x25x4 MERV 8 Pleated AC Furnace Air Filters. 4 Pack
234.4 out of 5 Stars. 23 reviews
Free shipping, arrives in 3+ days
Honeywell FC100A1037 (2-Pack) - 20" x 25" x 4" Pleated Air Filter, MERV 11 $70.60
$7060
current price $70.60Honeywell FC100A1037 (2-Pack) - 20" x 25" x 4" Pleated Air Filter, MERV 11
264.5 out of 5 Stars. 26 reviews
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Air Filter MERV 10 (2-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (10x20x1 2-pack), SB9730 $19.99
9 sizes
Available in additional 9 sizes$1999
current price $19.99Options from $19.99 – $34.99
Air Filter MERV 10 (2-Pack) - Pleated Air Conditioner HVAC AC Furnace Air Filters Replacement (10x20x1 2-pack), SB9730
73.9 out of 5 Stars. 7 reviews
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BNX TruFilter 20x25x1 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 10 $66.99
28 sizes
Available in additional 28 sizes$6699
current price $66.99Options from $47.99
BNX TruFilter 20x25x1 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 10
93.3 out of 5 Stars. 9 reviews
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Free shipping, arrives Wed, Feb 25
For AprilAire 210 Whole House Air Purifiers Replacement Appliance Filter - Models 1210, 1620, 2120, 2200, 2210, 2216, 3210, 4200, Furnace Filter MERV 11, 20x25x4 Air Filter (pack of 1) $39.00
$3900
current price $39.00For AprilAire 210 Whole House Air Purifiers Replacement Appliance Filter - Models 1210, 1620, 2120, 2200, 2210, 2216, 3210, 4200, Furnace Filter MERV 11, 20x25x4 Air Filter (pack of 1)
15 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days
20x25x4, Air Filter MERV 10 (1-Pcs), Pleated HVAC AC Furnace Air Filters Replacement $23.99
$2399
current price $23.9920x25x4, Air Filter MERV 10 (1-Pcs), Pleated HVAC AC Furnace Air Filters Replacement
13 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days
Medify Air 12x12x1 Air Filter, MERV 14 Pleated with HEPA, HVAC Furnace Filter, 2-Pack $58.99
7 options
Available in additional 7 options$5899
current price $58.99Options from $38.99
Medify Air 12x12x1 Air Filter, MERV 14 Pleated with HEPA, HVAC Furnace Filter, 2-Pack
204.9 out of 5 Stars. 20 reviews
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Free shipping, arrives Thu, Feb 26
Aerostar 20x25x4 MERV 11, Pleated Air Filter, 20 x 25 x 4, Box of 6, Made in the USA $125.93 Was $142.20
Now$12593
current price Now $125.93, Was $142.20$142.20
Aerostar 20x25x4 MERV 11, Pleated Air Filter, 20 x 25 x 4, Box of 6, Made in the USA
124.1 out of 5 Stars. 12 reviews
Free shipping, arrives in 3+ days
Filtrete 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 $49.73
$4973
current price $49.73Filtrete 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
1764.7 out of 5 Stars. 176 reviews
Free shipping, arrives in 3+ days
Fortify 20x25x4 MERV 11 Replacement for Honeywell FC100A1037 and Carrier Pleated HVAC AC Furnace Filters. (Quantity 1) Actual Size: 19.88 x 24.75 x 4.38 $36.97
$3697
current price $36.97Fortify 20x25x4 MERV 11 Replacement for Honeywell FC100A1037 and Carrier Pleated HVAC AC Furnace Filters. (Quantity 1) Actual Size: 19.88 x 24.75 x 4.38
Free shipping, arrives in 3+ days
210 20 in. x 25 in. x 4 in. MERV 11 FPR 12 Pleated Filter For Air Cleaner Models 1210/1620/2210/2216/3210/4200 (1-Pack) $78.99
$7899
current price $78.99210 20 in. x 25 in. x 4 in. MERV 11 FPR 12 Pleated Filter For Air Cleaner Models 1210/1620/2210/2216/3210/4200 (1-Pack)
Free shipping, arrives in 3+ days
Only 1 left
Filtrete 20x25x4 Refillable Air Filter Kit, MPR 1550 MERV 12, Ultra Allergen Reduction, 1 Reusable Frame with 2 HVAC Filters $89.99
$8999
current price $89.99Filtrete 20x25x4 Refillable Air Filter Kit, MPR 1550 MERV 12, Ultra Allergen Reduction, 1 Reusable Frame with 2 HVAC Filters
1384.8 out of 5 Stars. 138 reviews
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Free shipping, arrives Wed, Feb 25
20x25x4 MERV 8 ( MPR 600, FPR 5-6 ) 4" Air Filters for AC & Furnace. 2 Pack. Exact Size: 19-1/2 x 24-1/2 x 3-3/4 $39.95
$3995
current price $39.9520x25x4 MERV 8 ( MPR 600, FPR 5-6 ) 4" Air Filters for AC & Furnace. 2 Pack. Exact Size: 19-1/2 x 24-1/2 x 3-3/4
15 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days
Fortify 20x25x4 MERV 11 Replacement for Honeywell FC100A1037 and Carrier Pleated HVAC AC Furnace Filters. (2-Pack) Actual Size: 19.88 x 24.75 x 4.38 $59.97
$5997
current price $59.97Fortify 20x25x4 MERV 11 Replacement for Honeywell FC100A1037 and Carrier Pleated HVAC AC Furnace Filters. (2-Pack) Actual Size: 19.88 x 24.75 x 4.38
Free shipping, arrives in 3+ days
Honeywell FC100A1037 Furnace Filters, 20x25x4 Air Filter Replacement Merv 11 Filter Media with Homequip Disposal Bag $47.99
5 options
Available in additional 5 options$4799
current price $47.99Options from $47.99 – $174.99
Honeywell FC100A1037 Furnace Filters, 20x25x4 Air Filter Replacement Merv 11 Filter Media with Homequip Disposal Bag
214.4 out of 5 Stars. 21 reviews
Free shipping, arrives in 3+ days
Filtrete 20x25x4 Replacement Air Filters, MPR 1000 MERV 11, Allergen Defense, 2 Pack $44.99
$4499
current price $44.99Filtrete 20x25x4 Replacement Air Filters, MPR 1000 MERV 11, Allergen Defense, 2 Pack
1394.7 out of 5 Stars. 139 reviews
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Free shipping, arrives Wed, Feb 25
Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4-Pack, Fits Lennox & Honeywell Devices Actual Dimensions 19.88 x 24.63 x 4.31, 4 Count $79.49 Was $91.99
Now$7949
current price Now $79.49, Was $91.99$91.99
Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4-Pack, Fits Lennox & Honeywell Devices Actual Dimensions 19.88 x 24.63 x 4.31, 4 Count
25 out of 5 Stars. 2 reviews
Free shipping, arrives in 3+ days
BestAir, 20" x 25" x 4" Air Cleaning Furnace Filter, MERV 11, Carbon Infused to Neutralize Odor, For Honeywell Models, 1 Count Pack of 1 $41.24
$4124
current price $41.24BestAir, 20" x 25" x 4" Air Cleaning Furnace Filter, MERV 11, Carbon Infused to Neutralize Odor, For Honeywell Models, 1 Count Pack of 1
Free shipping, arrives in 3+ days