18x20 Filter(312)
Uses item details. Price when purchased online
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $28.18 $7.05/count
Sponsored
$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
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack $32.26 $5.38/count
Sponsored
$3226
current price $32.26$5.38/count
Aerostar 18x20x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack
574.7 out of 5 Stars. 57 reviews
Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count From $35.99
Sponsored
From$3599
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
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
Sponsored
$9189
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
Best seller Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
$564
current price $5.64Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
4884.5 out of 5 Stars. 488 reviews
Save with
Best seller Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter From $11.88
3 options
Available in additional 3 optionsFrom$1188
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
7454.5 out of 5 Stars. 745 reviews
Save with
Best seller Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
2 options
Available in additional 2 optionsFiltrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
2234.7 out of 5 Stars. 223 reviews
Save with
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
Best seller Air-Care 14x25x1 Forever Filter, Allergen & Dust Reduction, Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8
24 options
Available in additional 24 optionsAir-Care 14x25x1 Forever Filter, Allergen & Dust Reduction, Permanent Washable Electrostatic HVAC Furnace Air Filter, MERV 8
3894.5 out of 5 Stars. 389 reviews
Save with
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack From $13.44
3 options
Available in additional 3 optionsFrom$1344
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack
6064.7 out of 5 Stars. 606 reviews
Save with
Aerostar 18x20x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $38.73 $9.68/count
Sponsored
$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
Aerostar 18x20x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack $43.96 $7.33/count
Sponsored
$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
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
Save with
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
5964.8 out of 5 Stars. 596 reviews
Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack) $15.00 $15.00/in
$1500
current price $15.00$15.00/in
Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack)
1484.8 out of 5 Stars. 148 reviews
Save with
Rollback AMI PARTS 18X20X1 Furnace Air Filter MERV8 HVAC ,Air Filter for Allergen, Bacteria and Virus,6 Filters $35.09 Was $38.99
Now$3509
current price Now $35.09, Was $38.99$38.99
AMI PARTS 18X20X1 Furnace Air Filter MERV8 HVAC ,Air Filter for Allergen, Bacteria and Virus,6 Filters
54.8 out of 5 Stars. 5 reviews
Save with
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (6 Pack) From $34.99
42 options
Available in additional 42 optionsFrom$3499
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (6 Pack)
7854.6 out of 5 Stars. 785 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
574.7 out of 5 Stars. 57 reviews
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
Save with
PuroAir Mega Filter - MERV 13 18x20x1 Air Filters with Carbon From $24.99
15 options
Available in additional 15 optionsFrom$2499
PuroAir Mega Filter - MERV 13 18x20x1 Air Filters with Carbon
284.6 out of 5 Stars. 28 reviews
Save with
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96
Sponsored
$3496
current price $34.96Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
5964.8 out of 5 Stars. 596 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $39.96
Sponsored
$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
Best seller (4 pack) Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 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, Allergen, Bacteria and Virus, 1 Filter
Save with
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" $43.08
$4308
current price $43.08Filter 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"
344.7 out of 5 Stars. 34 reviews
Cabana Air Filters Furnace Air Filter - Merv 13 - 6 Pack, 18 x 20 x 1 From $46.99
16 options
Available in additional 16 optionsFrom$4699
Cabana Air Filters Furnace Air Filter - Merv 13 - 6 Pack, 18 x 20 x 1
344.7 out of 5 Stars. 34 reviews
Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count From $35.99
4 options
Available in additional 4 optionsFrom$3599
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
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
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
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen, and Pet Dander Reduction, 6 Pack From $22.85
2 options
Available in additional 2 optionsFrom$2285
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen, and Pet Dander Reduction, 6 Pack
94.7 out of 5 Stars. 9 reviews
Save with
AAF Flanders EZ-Flow II 18X20X1 Flat Panel Furnace Air Filter MERV 1, 1 Filter $53.32
$5332
current price $53.32AAF Flanders EZ-Flow II 18X20X1 Flat Panel Furnace Air Filter MERV 1, 1 Filter
74.3 out of 5 Stars. 7 reviews
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $45.96
Sponsored
$4596
current price $45.96Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
1644.8 out of 5 Stars. 164 reviews
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $57.96
Sponsored
$5796
current price $57.96Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
1424.7 out of 5 Stars. 142 reviews
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" $37.74
$3774
current price $37.74Filter 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"
454.6 out of 5 Stars. 45 reviews
Cabana Air Filters Furnace Air Filter - MERV 11 - 6 Pack, 18 x 20 x 1 From $39.99
17 options
Available in additional 17 optionsFrom$3999
Cabana Air Filters Furnace Air Filter - MERV 11 - 6 Pack, 18 x 20 x 1
344.9 out of 5 Stars. 34 reviews
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $52.58
$5258
current price $52.58Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
11 out of 5 Stars. 1 reviews
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" $37.68
$3768
current price $37.68Filter 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
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
PureFlow, Home Furnace Air Filter 18x20x1, with 4 Layers of Advanced Filtration Technology, MERV-13 Pack-of-2 From $32.83
31 options
Available in additional 31 optionsFrom$3283
PureFlow, Home Furnace Air Filter 18x20x1, with 4 Layers of Advanced Filtration Technology, MERV-13 Pack-of-2
584.1 out of 5 Stars. 58 reviews
Airflux Filters Fiberglass Furnace Filters, 18x20x1, for Dust, 12 Pack From $56.94
52 options
Available in additional 52 optionsFrom$5694
Airflux Filters Fiberglass Furnace Filters, 18x20x1, for Dust, 12 Pack
54.2 out of 5 Stars. 5 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack $33.99
$3399
current price $33.99Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack
3594.8 out of 5 Stars. 359 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
Available in additional 45 optionsFrom$3709
PUREFLOW Home Air Filter MERV 11, 18x20x1 Furnace Filter, 4 Layer High Efficiency Filtration for Dust, Smoke, Fumes, Pollutants (4-Pack)
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $45.96
$4596
current price $45.96Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
1644.8 out of 5 Stars. 164 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)
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" $92.76
$9276
current price $92.76Filter 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
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" $53.84
$5384
current price $53.84Filter 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"
164.8 out of 5 Stars. 16 reviews
Filterbuy 18x20x2 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack $41.98
$4198
current price $41.98Filterbuy 18x20x2 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack
114.5 out of 5 Stars. 11 reviews
Aerostar 18x20x4 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $213.36
$21336
current price $213.36Aerostar 18x20x4 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack
FILTER FURN GLS 18X20X1" $45.99
$4599
current price $45.99FILTER FURN GLS 18X20X1"
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (8 Pack) From $26.60
5 options
Available in additional 5 optionsFrom$2660
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (8 Pack)
5974.6 out of 5 Stars. 597 reviews
18x20x1 (17_1/2x19_1/2) Pleated MERV 7 Air Filters 4 Pack From $38.99
5 options
Available in additional 5 optionsFrom$3899
18x20x1 (17_1/2x19_1/2) Pleated MERV 7 Air Filters 4 Pack
25 out of 5 Stars. 2 reviews
Popular in 18x20 Filter
Related Products
Filter King 19.5x22x1 Air Filter | 4-PACK | Carbon MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 19.5 x 22 x .75"
Filter King 19.5x22x1 Air Filter | 4-PACK | Carbon MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 19.5 x 22 x .75"$116.08current price $116.08Filter King 11x11x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11 x 11 x .75"
Filter King 11x11x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11 x 11 x .75"$60.68current price $60.68Filter King 11x28x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11 x 28 x .75"
Filter King 11x28x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11 x 28 x .75"$66.08current price $66.08Filter King 14x6x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14 x 6 x .75"
Filter King 14x6x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14 x 6 x .75"$55.86current price $55.86Filter King 7x49x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 7 x 49 x .75"
Filter King 7x49x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 7 x 49 x .75"$72.12current price $72.12Filter King 14x20x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 13.5 x 19.5 x 3.75"
Filter King 14x20x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 13.5 x 19.5 x 3.75"$78.64current price $78.6414x14x1 MERV 10 Pleated HVAC Air Filters by Glasfloss. ( Quantity 5 ) Exact Size: 13-1/2 x 13-1/2 x 7/8
14x14x1 MERV 10 Pleated HVAC Air Filters by Glasfloss. ( Quantity 5 ) Exact Size: 13-1/2 x 13-1/2 x 7/8$37.98current price $37.98Filter King 12x20x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11.5 x 19.5 x 3.75"
Filter King 12x20x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 11.5 x 19.5 x 3.75"$72.52current price $72.5212x12x1 (11_3/4x11_3/4) Furnace Air Filters MERV 10 Pleated Plus Carbon 3 Pack
12x12x1 (11_3/4x11_3/4) Furnace Air Filters MERV 10 Pleated Plus Carbon 3 Pack$50.99current price $50.99Filter King 15x25x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14.5 x 24.5 x 3.75"
Filter King 15x25x4 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14.5 x 24.5 x 3.75"$79.00current price $79.00Filter King 14.5x19x1 Air Filter | 4-PACK | Carbon MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14.5 x 19 x .75"
Filter King 14.5x19x1 Air Filter | 4-PACK | Carbon MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14.5 x 19 x .75"$79.84current price $79.84Filterbuy 6x10x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
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"$91.68current price $91.68Filter King 19x4x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 19 x 4 x .75"
Filter King 19x4x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 19 x 4 x .75"$66.56current price $66.56