18x20 Filter(317)
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12 Pack of 18x20x2 MERV 10 Pleated 2" Inch Air Filters by Glasfloss. Actual Size: 17-1/2 x 19-1/2 x 1-3/4 $91.89
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current price $91.8912 Pack of 18x20x2 MERV 10 Pleated 2" Inch Air Filters by Glasfloss. Actual Size: 17-1/2 x 19-1/2 x 1-3/4
Reair 18x20x1 Air filter, Washable and Reusable Air Filter 18x20x1 for AC HVAC Furnace, MERV 8 Air Filters Machine Washable & Dryer Friendly, AC Furnace Air Filter From $39.99
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REair 18x20x1 Air filter Pro Kit, Washable and Reusable Air Filter 18x20x1 for AC HVAC Furnace, MERV 8 Air Filters Machine Washable & Dryer Friendly, AC Furnace Air Filter, Include 2 Filters&1 Frame From $59.99
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REair 18x20x1 Air filter Pro Kit, Washable and Reusable Air Filter 18x20x1 for AC HVAC Furnace, MERV 8 Air Filters Machine Washable & Dryer Friendly, AC Furnace Air Filter, Include 2 Filters&1 Frame
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96
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current price $34.96Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
5994.8 out of 5 Stars. 599 reviews
100+ bought since yesterday Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Basic Dust and Lint, 1 Filter $5.64
$564
current price $5.64Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Basic Dust and Lint, 1 Filter
4944.5 out of 5 Stars. 494 reviews
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100+ bought since yesterday Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter From $11.88
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Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
7494.5 out of 5 Stars. 749 reviews
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Best seller Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergens, Bacteria & Viruses, 1 Filter
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2264.7 out of 5 Stars. 226 reviews
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Best seller Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergens & Pet Dander, 4 Pack From $13.44
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Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergens & Pet Dander, 4 Pack
6094.7 out of 5 Stars. 609 reviews
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Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $28.18 $7.05/count
$2818
current price $28.18$7.05/count
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
84.8 out of 5 Stars. 8 reviews
Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack) $15.00 $15.00/in
$1500
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Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack)
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Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $39.96
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4014.7 out of 5 Stars. 401 reviews
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $57.96
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1424.7 out of 5 Stars. 142 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96
$3496
current price $34.96Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
5994.8 out of 5 Stars. 599 reviews
Best seller Air-Care 18x20x1 Forever Filter, Allergen & Dust Reduction, Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8
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Available in additional 24 optionsAir-Care 18x20x1 Forever Filter, Allergen & Dust Reduction, Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8
3964.5 out of 5 Stars. 396 reviews
AMI PARTS 18x20x1 HVAC Furnace Air Filter MERV 8 for Dust Reduction,4 Filters $27.99
$2799
current price $27.99AMI PARTS 18x20x1 HVAC Furnace Air Filter MERV 8 for Dust Reduction,4 Filters
134.6 out of 5 Stars. 13 reviews
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Best seller Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (6 Pack) From $27.25
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Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (6 Pack)
7984.6 out of 5 Stars. 798 reviews
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen & Pet Dander Reduction, 6 Pack From $22.85
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Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen & Pet Dander Reduction, 6 Pack
94.7 out of 5 Stars. 9 reviews
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Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $39.96
$3996
current price $39.96Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
4014.7 out of 5 Stars. 401 reviews
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack $32.26 $5.38/count
$3226
current price $32.26$5.38/count
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack
584.7 out of 5 Stars. 58 reviews
AMI PARTS 18X20X1 Furnace Air Filter MERV8 HVAC ,Air Filter for Allergen, Bacteria and Virus,6 Filters $36.99
$3699
current price $36.99AMI PARTS 18X20X1 Furnace Air Filter MERV8 HVAC ,Air Filter for Allergen, Bacteria and Virus,6 Filters
54.8 out of 5 Stars. 5 reviews
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Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $45.96
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1644.8 out of 5 Stars. 164 reviews
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $39.96
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2074.8 out of 5 Stars. 207 reviews
Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count From $35.99
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Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count
54.8 out of 5 Stars. 5 reviews
PuroAir Mega Filter - MERV 13 18x20x1 Air Filters with Carbon From $24.99
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PuroAir Mega Filter - MERV 13 18x20x1 Air Filters with Carbon
314.6 out of 5 Stars. 31 reviews
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18 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 ( 1 Pack) $19.99
$1999
current price $19.9918 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 ( 1 Pack)
33 out of 5 Stars. 3 reviews
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Simply Filters 18x20x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter (2 Pack) From $29.97
6 options
Available in additional 6 optionsFrom$2997
Simply Filters 18x20x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter (2 Pack)
14 out of 5 Stars. 1 reviews
Filter King 18x20x0.5 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x 0.5" $91.84
$9184
current price $91.84Filter King 18x20x0.5 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x 0.5"
1515 out of 5 Stars. 151 reviews
ECO POWER 18x20x1 Air Filter 4 pack, MERV 11 Pleated Furnace & AC Filter, HVAC Replacement Filter for Household Dust & Airborne Particles. $37.99
$3799
current price $37.99ECO POWER 18x20x1 Air Filter 4 pack, MERV 11 Pleated Furnace & AC Filter, HVAC Replacement Filter for Household Dust & Airborne Particles.
Aerostar 18x20x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack $43.96 $7.33/count
$4396
current price $43.96$7.33/count
Aerostar 18x20x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack
354.5 out of 5 Stars. 35 reviews
Filter King 18x20x1 Air Filter | 6-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $52.14 Was $61.38
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Filter King 18x20x1 Air Filter | 6-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
334.8 out of 5 Stars. 33 reviews
Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $178.98 Was $232.67
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Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
74 out of 5 Stars. 7 reviews
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $49.96
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2194.7 out of 5 Stars. 219 reviews
Best seller (4 pack) Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergens, Bacteria & Viruses, 1 Filter $73.88 $18.47/ea
$7388
current price $73.88$18.47/ea
(4 pack) Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergens, Bacteria & Viruses, 1 Filter
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Filter King 18x20x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $34.28
$3428
current price $34.28Filter King 18x20x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
454.7 out of 5 Stars. 45 reviews
Cabana Air Filters Furnace Air Filter - Merv 13 - 6 Pack, 18 x 20 x 1 From $34.99
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Available in additional 15 optionsFrom$3499
Cabana Air Filters Furnace Air Filter - Merv 13 - 6 Pack, 18 x 20 x 1
344.7 out of 5 Stars. 34 reviews
Filterbuy 18x20x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack $28.99
$2899
current price $28.99Filterbuy 18x20x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
164.3 out of 5 Stars. 16 reviews
Filter King 18x20x1 Air Filter | 6-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $32.34 Was $39.90
Now$3234
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Filter King 18x20x1 Air Filter | 6-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
374.7 out of 5 Stars. 37 reviews
Cabana Air Filters Furnace Air Filter - MERV 11 - 6 Pack, 18 x 20 x 1 From $37.99
15 options
Available in additional 15 optionsFrom$3799
Cabana Air Filters Furnace Air Filter - MERV 11 - 6 Pack, 18 x 20 x 1
344.9 out of 5 Stars. 34 reviews
Aerostar 18x20x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $38.73 $9.68/count
$3873
current price $38.73$9.68/count
Aerostar 18x20x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack
54.2 out of 5 Stars. 5 reviews
18 in. x 20 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 ( 2 Pack ) $38.99
$3899
current price $38.9918 in. x 20 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 ( 2 Pack )
15 out of 5 Stars. 1 reviews
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PureFlow, Home Furnace Air Filter 18x20x1, with 4 Layers of Advanced Filtration Technology, MERV-13 Pack-of-2 From $38.95
31 options
Available in additional 31 optionsFrom$3895
PureFlow, Home Furnace Air Filter 18x20x1, with 4 Layers of Advanced Filtration Technology, MERV-13 Pack-of-2
594.1 out of 5 Stars. 59 reviews
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $62.99
$6299
current price $62.99Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
Nordic Pure 18x20x2 Pleated MERV 13 Air Filters 12 Pack From $52.49
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Nordic Pure 18x20x2 Pleated MERV 13 Air Filters 12 Pack
Filter King 18x20x1 Air Filter | 3-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $36.63
$3663
current price $36.63Filter King 18x20x1 Air Filter | 3-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
484.6 out of 5 Stars. 48 reviews
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack $44.98
$4498
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1474.6 out of 5 Stars. 147 reviews
Filter King 18x20x1 Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $48.96
$4896
current price $48.96Filter King 18x20x1 Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
194.8 out of 5 Stars. 19 reviews
LifeSupplyUSA 18x20x1 Electrostatic Air Filter, MERV 8, Washable, Reusable Furnace AC/HVAC Filter, Energy Saving, Easy to Clean, Long-Lasting From $29.99
17 options
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LifeSupplyUSA 18x20x1 Electrostatic Air Filter, MERV 8, Washable, Reusable Furnace AC/HVAC Filter, Energy Saving, Easy to Clean, Long-Lasting
254.4 out of 5 Stars. 25 reviews
PUREFLOW Home Air Filter MERV 11, 18x20x1 Furnace Filter, 4 Layer High Efficiency Filtration for Dust, Smoke, Fumes, Pollutants (4-Pack) From $37.09
45 options
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PUREFLOW Home Air Filter MERV 11, 18x20x1 Furnace Filter, 4 Layer High Efficiency Filtration for Dust, Smoke, Fumes, Pollutants (4-Pack)
Pamlico Air 18x20x1 in. Fiberglass 4 MERV Air Filter - Pack of 12 - White $62.01
$6201
current price $62.01Pamlico Air 18x20x1 in. Fiberglass 4 MERV Air Filter - Pack of 12 - White
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $58.99
$5899
current price $58.99Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
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Filterbuy 6x10x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack$29.99current price $29.99Filter King 6x6x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 5.5 x 5.5 x .75"
Filter King 6x6x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 5.5 x 5.5 x .75"$90.76current price $90.76Filter King 19x4x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 19 x 4 x .75"
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