18x20 Filter(352)
Uses item details. Price when purchased online
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $39.96 Was $51.95
Sponsored
Now$3996
current price Now $39.96, Was $51.95$51.95
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
584.6 out of 5 Stars. 58 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96 Was $45.45
Sponsored
Now$3496
current price Now $34.96, Was $45.45$45.45
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
2414.8 out of 5 Stars. 241 reviews
Flash Deal Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $41.36 Was $59.75
Sponsored
Now$4136
current price Now $41.36, Was $59.75$59.75
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
324.8 out of 5 Stars. 32 reviews
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $39.96
Sponsored
$3996
current price $39.96Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
774.8 out of 5 Stars. 77 reviews
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
4184.5 out of 5 Stars. 418 reviews
Save with
50+ bought since yesterday 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
6764.5 out of 5 Stars. 676 reviews
Save with
Best seller Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter $18.47
$1847
current price $18.47Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
1524.7 out of 5 Stars. 152 reviews
Save with
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter $17.57
$1757
current price $17.57Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
5344.7 out of 5 Stars. 534 reviews
Save with
Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack $28.87
$2887
current price $28.87Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
484.7 out of 5 Stars. 48 reviews
AMI PARTS 18x20x1 HVAC Furnace Air Filter MERV 8 for Dust Reduction,4 Filters $26.09
$2609
current price $26.09AMI PARTS 18x20x1 HVAC Furnace Air Filter MERV 8 for Dust Reduction,4 Filters
44.8 out of 5 Stars. 4 reviews
Save with
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $44.96
Sponsored
$4496
current price $44.96Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
854.8 out of 5 Stars. 85 reviews
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack $88.92 Was $115.60
Sponsored
Now$8892
current price Now $88.92, Was $115.60$115.60
Filterbuy 18x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack
84.9 out of 5 Stars. 8 reviews
True Value 1000 Micro Filter, Pack of 4 - 18 x 20 x 1 in. $77.76
$7776
current price $77.76True Value 1000 Micro Filter, Pack of 4 - 18 x 20 x 1 in.
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
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $55.99
$5599
current price $55.99Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
BestAir B1-1820-11-6 18x20 x 1 In. MERV 11 Furnace Filter, 90 Days - Quantity 6
BestAir B1-1820-11-6 18x20 x 1 In. MERV 11 Furnace Filter, 90 Days - Quantity 6
Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack) $15.00 $15.00/count
$1500
current price $15.00$15.00/count
Filterbuy 18x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack)
164.6 out of 5 Stars. 16 reviews
Save with
BNX TruFilter 18x20x1 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 10 $46.99
$4699
current price $46.99BNX TruFilter 18x20x1 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 10
14 out of 5 Stars. 1 reviews
Save with
Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count From $35.99
3 options
Available in additional 3 optionsFrom$3599
Clorox 18x20x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count
44.8 out of 5 Stars. 4 reviews
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack $43.98 $11.00/ea
$4398
current price $43.98$11.00/ea
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack
5384.7 out of 5 Stars. 538 reviews
Save with
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $56.94
Sponsored
$5694
current price $56.94Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
85 out of 5 Stars. 8 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack $79.92
Sponsored
$7992
current price $79.92Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack
234.8 out of 5 Stars. 23 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $39.96 Was $51.95
Now$3996
current price Now $39.96, Was $51.95$51.95
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
584.6 out of 5 Stars. 58 reviews
Precisionaire Furnace Air Filter 18" X 20" X 1" Fiberglass $44.03
$4403
current price $44.03Precisionaire Furnace Air Filter 18" X 20" X 1" Fiberglass
18x20x1, Protect Plus Industries Air Filter, MERV 3
18x20x1, Protect Plus Industries Air Filter, MERV 3
25 out of 5 Stars. 2 reviews
10055.01182 18x20x1 FBG Furn Filter $46.57
$4657
current price $46.5710055.01182 18x20x1 FBG Furn Filter
10055.01182 18x20x1 FBG Furn Filter $57.57
$5757
current price $57.5710055.01182 18x20x1 FBG Furn Filter
Best Air B1-1820-8-12 18" x 20" x 1" Pleated Furnace Air Filter 90 Days - Quantity of 12 $109.89
$10989
current price $109.89Best Air B1-1820-8-12 18" x 20" x 1" Pleated Furnace Air Filter 90 Days - Quantity of 12
Air-Care 18x20 Electrostatic Flexible Permanent Washable HVAC Furnace Filter, MERV 8 $44.95
$4495
current price $44.95Air-Care 18x20 Electrostatic Flexible Permanent Washable HVAC Furnace Filter, MERV 8
24 out of 5 Stars. 2 reviews
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96 Was $45.45
Now$3496
current price Now $34.96, Was $45.45$45.45
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
2414.8 out of 5 Stars. 241 reviews
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack $105.96
Sponsored
$10596
current price $105.96Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack
54.8 out of 5 Stars. 5 reviews
3 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 $37.95
Sponsored
$3795
current price $37.953 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
15 out of 5 Stars. 1 reviews
Filtrete 18x20x1 Air Filter, MPR 1500 MERV 12, Advanced Allergen Reduction, 1 New Filter From $18.47
2 options
Available in additional 2 optionsFrom$1847
Filtrete 18x20x1 Air Filter, MPR 1500 MERV 12, Advanced Allergen Reduction, 1 New Filter
5844.8 out of 5 Stars. 584 reviews
18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted $47.64 Was $56.09
Now$4764
current price Now $47.64, Was $56.09$56.09
18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $54.76
$5476
current price $54.76Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
11 out of 5 Stars. 1 reviews
Flash Deal Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $134.95
$13495
current price $134.95Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
10055.01182 18x20x1 FBG Furn Filter $42.93 Was $52.69
Now$4293
current price Now $42.93, Was $52.69$52.69
10055.01182 18x20x1 FBG Furn Filter
18x20x1 (17_1/2x19_1/2) Pleated MERV 14 Air Filters 4 Pack From $52.99
5 options
Available in additional 5 optionsFrom$5299
18x20x1 (17_1/2x19_1/2) Pleated MERV 14 Air Filters 4 Pack
3 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 $37.95
$3795
current price $37.953 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
15 out of 5 Stars. 1 reviews
18x20x1 in. Fiberglass 4 MERV Air Filter - Pack of 12 - White $58.31
$5831
current price $58.3118x20x1 in. Fiberglass 4 MERV Air Filter - Pack of 12 - White
15 out of 5 Stars. 1 reviews
10055.011820 18 x 20 x 1 in. EZ Flow II Spun Fiberglass Disposable Furnace Filter - Pack Of 12 $58.03
$5803
current price $58.0310055.011820 18 x 20 x 1 in. EZ Flow II Spun Fiberglass Disposable Furnace Filter - Pack Of 12
54.8 out of 5 Stars. 5 reviews
Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack $46.99
$4699
current price $46.99Filterbuy 18x20x4 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12) $60.99
$6099
current price $60.99Protect Plus Air 118201 Fiberglass Air Filter, 18" X 20" X 1" (Pack of 12)
Filter King 18x20x2 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 18 x 20 x 1.75) $83.14 Was $94.20
Now$8314
current price Now $83.14, Was $94.20$94.20
Filter King 18x20x2 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 18 x 20 x 1.75)
15 out of 5 Stars. 1 reviews
10055.01182 18x20x1 FBG Furn Filter $71.61
$7161
current price $71.6110055.01182 18x20x1 FBG Furn Filter
Flash Deal Filterbuy 18x20x2 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack $87.26 Was $96.96
Now$8726
current price Now $87.26, Was $96.96$96.96
Filterbuy 18x20x2 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
Air Bear MERV 8 18x20x1 Pleated Air Filter 2-pack (Actual Size: 17.5x2x19.5x.75) $29.08
$2908
current price $29.08Air Bear MERV 8 18x20x1 Pleated Air Filter 2-pack (Actual Size: 17.5x2x19.5x.75)
Air Bear MERV 8 18x20x1 Pleated Air Filter 8-pack (Actual Size: 17.5x2x19.5x.75) $51.68
$5168
current price $51.68Air Bear MERV 8 18x20x1 Pleated Air Filter 8-pack (Actual Size: 17.5x2x19.5x.75)
84858011820 NaturalAire Standard Pleated Air Filter - Pack Of 12 - Natural - 18 x 20 x 1 in. $87.61 Was $109.85
Now$8761
current price Now $87.61, Was $109.85$109.85
84858011820 NaturalAire Standard Pleated Air Filter - Pack Of 12 - Natural - 18 x 20 x 1 in.
18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted $46.57 Was $55.26
Now$4657
current price Now $46.57, Was $55.26$55.26
18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted
Popular in 18x20 Filter
Related Products
Filter King 28x49x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 28 x 49 x .75"
Filter King 28x49x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 28 x 49 x .75"$174.48current price $174.48Filter King 6x6x1 Air Filter | 3-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 | 3-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 5.5 x 5.5 x .75"$100.03current price $100.03Filterbuy 10x12x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
Filterbuy 10x12x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack$65.94current price $65.94Filterbuy 10x12x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack
Filterbuy 10x12x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack$42.99current price $42.99SpiroPure 18X18X1 MERV 8 Pleated Air Filters - Made in USA (6 Pack)
SpiroPure 18X18X1 MERV 8 Pleated Air Filters - Made in USA (6 Pack)$47.44current price $47.44Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 5-Pack
Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 5-Pack$65.95current price $65.95Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack
Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack$44.97current price $44.97Filter King 14x22x1 Air Filter | 12-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14 x 22 x .75"
Filter King 14x22x1 Air Filter | 12-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 14 x 22 x .75"$144.96current price $144.96Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
Filterbuy 10x14x2 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack$25.99current price $25.99Filter 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"$102.36current price $102.36Filter 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"$53.52current price $53.52Nordic Pure 10x10x1 Pleated Air Filters MERV 7 Plus Carbon 3 Pack
Nordic Pure 10x10x1 Pleated Air Filters MERV 7 Plus Carbon 3 Pack$48.99current price $48.99HDX 14 in. x 20 in. x 1 in. Elite Pleated Air Filter FPR 10 (14x20x1)
HDX 14 in. x 20 in. x 1 in. Elite Pleated Air Filter FPR 10 (14x20x1)$20.85current price $20.85Filter 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"$62.92current price $62.92Filter 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"$68.68current price $68.68Filter 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"$69.32current price $69.32