18x1(55)
Uses item details. Price when purchased online
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack $48.00 $8.00/count
Sponsored
$4800
current price $48.00$8.00/count
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack
124.9 out of 5 Stars. 12 reviews
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $34.95 $5.83/count
Sponsored
$3495
current price $34.95$5.83/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
54.2 out of 5 Stars. 5 reviews
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack $39.96 $6.66/count
Sponsored
$3996
current price $39.96$6.66/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack
494.8 out of 5 Stars. 49 reviews
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack $40.50
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$4050
current price $40.50Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack
24.5 out of 5 Stars. 2 reviews
100+ bought since yesterday Filtrete 18x18x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
$564
current price $5.64Filtrete 18x18x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
3434.5 out of 5 Stars. 343 reviews
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Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $34.95 $5.83/count
$3495
current price $34.95$5.83/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
54.2 out of 5 Stars. 5 reviews
AAF 118181 Air Filter, 18 in L x 18 in W x 1 in T $44.39
$4439
current price $44.39AAF 118181 Air Filter, 18 in L x 18 in W x 1 in T
True Blue 118181 Furnace Air Filter, 18" x 18" x 1" $52.63
$5263
current price $52.63True Blue 118181 Furnace Air Filter, 18" x 18" x 1"
11 out of 5 Stars. 1 reviews
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter From $13.49
2 options
Available in additional 2 optionsFrom$1349
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
5494.7 out of 5 Stars. 549 reviews
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3M Filtrete 317-4 18" x 18" x 1" Gray Basic 300 Dust & Lint Reduction Pleated Air Filter 90 Day Filter - Quantity of 4 $49.89
$4989
current price $49.893M Filtrete 317-4 18" x 18" x 1" Gray Basic 300 Dust & Lint Reduction Pleated Air Filter 90 Day Filter - Quantity of 4
Aerostar 18x18x1 MERV 6 Air Filter, Pleated AC Furnace HVAC, Dust Lint Control, 6 Pack From $38.92
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From$3892
Aerostar 18x18x1 MERV 6 Air Filter, Pleated AC Furnace HVAC, Dust Lint Control, 6 Pack
724.7 out of 5 Stars. 72 reviews
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $54.68 $9.11/count
Sponsored
$5468
current price $54.68$9.11/count
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack
33 out of 5 Stars. 3 reviews
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack $39.96 $6.66/count
$3996
current price $39.96$6.66/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 6 Pack
494.8 out of 5 Stars. 49 reviews
K&N HVC-8-11818 HVAC Filter; 18 x 18 x 1, MERV 8 $49.99
$4999
current price $49.99K&N HVC-8-11818 HVAC Filter; 18 x 18 x 1, MERV 8
True Blue 118181 Furnace Air Filter 18 x 18 x 1
True Blue 118181 Furnace Air Filter 18 x 18 x 1
15 out of 5 Stars. 1 reviews
18x18x1 Air Filter MERV 13 Rating, 12 Pack of Furnace Filters Comparable to MPR 1500 - 2200 & FPR 9 - Made in USA by AIRX FILTERS WICKED CLEAN AIR. $111.14
$11114
current price $111.1418x18x1 Air Filter MERV 13 Rating, 12 Pack of Furnace Filters Comparable to MPR 1500 - 2200 & FPR 9 - Made in USA by AIRX FILTERS WICKED CLEAN AIR.
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack $48.00 $8.00/count
$4800
current price $48.00$8.00/count
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack
124.9 out of 5 Stars. 12 reviews
Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12 $64.06
$6406
current price $64.06Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12
15 out of 5 Stars. 1 reviews
Glasfloss ZLP14181 Z-Line Pleated Filter MERV 10 40% Eff - 14 in. X 18 in. X 1 - 0.3 Lbs $30.31
$3031
current price $30.31Glasfloss ZLP14181 Z-Line Pleated Filter MERV 10 40% Eff - 14 in. X 18 in. X 1 - 0.3 Lbs
WJSP Air Filter 18X18X1 inch for Furnace HVAC $42.60
$4260
current price $42.60WJSP Air Filter 18X18X1 inch for Furnace HVAC
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $37.50 $6.25/count
Sponsored
$3750
current price $37.50$6.25/count
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack
25 out of 5 Stars. 2 reviews
12 Pack of 18x18x1 MERV 10 Pleated Air Filters by Glasfloss. Actual Size: 17-1/2 x 17-1/2 x 7/8 $79.95
Sponsored
$7995
current price $79.9512 Pack of 18x18x1 MERV 10 Pleated Air Filters by Glasfloss. Actual Size: 17-1/2 x 17-1/2 x 7/8
54 out of 5 Stars. 5 reviews
K&N HVC-11818 HVAC Filter; 18 x 18 x 1, MERV 11 $59.99
$5999
current price $59.99K&N HVC-11818 HVAC Filter; 18 x 18 x 1, MERV 11
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack $40.50
$4050
current price $40.50Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack
24.5 out of 5 Stars. 2 reviews
18x18x1 Air Filter MERV 11 Rating, 12 Pack of Furnace Filters Comparable to MPR 1000, MPR 1200 & FPR 7 - Made in USA by AIRX FILTERS WICKED CLEAN AIR. $85.10
$8510
current price $85.1018x18x1 Air Filter MERV 11 Rating, 12 Pack of Furnace Filters Comparable to MPR 1000, MPR 1200 & FPR 7 - Made in USA by AIRX FILTERS WICKED CLEAN AIR.
Filter King 18x18x1 Air Filter | 6-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $43.14
$4314
current price $43.14Filter King 18x18x1 Air Filter | 6-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
154.9 out of 5 Stars. 15 reviews
18x18x1 Air Filter MERV 8 Comparable to MPR 700 & FPR 5 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC AC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR. $51.46
$5146
current price $51.4618x18x1 Air Filter MERV 8 Comparable to MPR 700 & FPR 5 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC AC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR.
18x18x1 Air Filter MERV 8 Rating, 12 Pack of Furnace Filters Comparable to MPR 700 & FPR 5 - Made in USA by AIRX FILTERS WICKED CLEAN AIR. $84.82
$8482
current price $84.8218x18x1 Air Filter MERV 8 Rating, 12 Pack of Furnace Filters Comparable to MPR 700 & FPR 5 - Made in USA by AIRX FILTERS WICKED CLEAN AIR.
18x18x1 MERV 10 Pleated AC Furnace Air Filters by Glasfloss Industries. ( 8 Pack ) Exact Size: 17-1/2 x 17-1/2 x 7/8 $56.98
$5698
current price $56.9818x18x1 MERV 10 Pleated AC Furnace Air Filters by Glasfloss Industries. ( 8 Pack ) Exact Size: 17-1/2 x 17-1/2 x 7/8
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $54.68 $9.11/count
$5468
current price $54.68$9.11/count
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack
33 out of 5 Stars. 3 reviews
Deal Clorox 18x18x1 Air Filter MERV 8 Dust & Lint Defense HVAC Furnace Filters, MPR 600 & FPR 5, 4 Count From $31.49
Sponsored
From$3149
Clorox 18x18x1 Air Filter MERV 8 Dust & Lint Defense HVAC Furnace Filters, MPR 600 & FPR 5, 4 Count
55 out of 5 Stars. 5 reviews
Aerostar 14x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack $41.99 $10.50/count
Sponsored
$4199
current price $41.99$10.50/count
Aerostar 14x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 4 Pack
334.6 out of 5 Stars. 33 reviews
Filter King 18x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $36.68
$3668
current price $36.68Filter King 18x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
174.9 out of 5 Stars. 17 reviews
Best Air B1-1818-8-12 18" x 18" x 1" Pleated Furnace Air Filter 90 Days - Quantity of 12 $94.83
$9483
current price $94.83Best Air B1-1818-8-12 18" x 18" x 1" Pleated Furnace Air Filter 90 Days - Quantity of 12
Filter King 18x18x1 Air Filter | 6-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $78.84
$7884
current price $78.84Filter King 18x18x1 Air Filter | 6-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
264.9 out of 5 Stars. 26 reviews
14 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR-7, MERV-11 (2-Pack) $21.99
$2199
current price $21.9914 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR-7, MERV-11 (2-Pack)
34.3 out of 5 Stars. 3 reviews
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Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $37.50 $6.25/count
$3750
current price $37.50$6.25/count
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack
25 out of 5 Stars. 2 reviews
Flanders 10055.011418 Standard Grade EZ Flow II Furnace Filter 12/Pack, 18" x 14" x 1" - Lot of 12 $40.56
$4056
current price $40.56Flanders 10055.011418 Standard Grade EZ Flow II Furnace Filter 12/Pack, 18" x 14" x 1" - Lot of 12
Flanders 84858.011818 18 x 18 x 1 in. NaturalAire Standard Pleated Air Filter - Pack Of 12 $91.84
$9184
current price $91.84Flanders 84858.011818 18 x 18 x 1 in. NaturalAire Standard Pleated Air Filter - Pack Of 12
Filter King 18x18x1 Air Filter | 6-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $65.46
$6546
current price $65.46Filter King 18x18x1 Air Filter | 6-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
264.9 out of 5 Stars. 26 reviews
True Blue 14 In. x 18 In. x 1 In. Merv 2 Fiberglass Furnace Filter Pack of 12
True Blue 14 In. x 18 In. x 1 In. Merv 2 Fiberglass Furnace Filter Pack of 12
14 out of 5 Stars. 1 reviews
18X18X1 MERV 8 Pleated AC Furnace Air Filters. 6 Pack $44.95
$4495
current price $44.9518X18X1 MERV 8 Pleated AC Furnace Air Filters. 6 Pack
114.7 out of 5 Stars. 11 reviews
Filter King 18x18x1 Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $47.56
$4756
current price $47.56Filter King 18x18x1 Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
324.6 out of 5 Stars. 32 reviews
Filter King 18x18x1 Air Filter | 4-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $52.40
$5240
current price $52.40Filter King 18x18x1 Air Filter | 4-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75"
154.9 out of 5 Stars. 15 reviews
18x18x1 Air Filter MERV 11 Comparable to MPR 1000, MPR 1200 & FPR 7 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR. $49.30
$4930
current price $49.3018x18x1 Air Filter MERV 11 Comparable to MPR 1000, MPR 1200 & FPR 7 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR.
Filterbuy 18x18x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack $33.99 $33.99/in
$3399
current price $33.99$33.99/in
Filterbuy 18x18x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
824.7 out of 5 Stars. 82 reviews
18x18x1 Air Filter MERV 13 Comparable to MPR 1500 - 2200 & FPR 9 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC AC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR. $56.41
$5641
current price $56.4118x18x1 Air Filter MERV 13 Comparable to MPR 1500 - 2200 & FPR 9 Electrostatic Pleated Air Conditioner Filter 6 Pack HVAC AC Premium USA Made 18x18x1 Furnace Filters by AIRX FILTERS WICKED CLEAN AIR.
Filter King 4.5x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 4.5 x 18 x .75" $71.88
$7188
current price $71.88Filter King 4.5x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 4.5 x 18 x .75"
18x18x1 MERV 10 Pleated HVAC Air Filters by Glasfloss. ( Quantity 5 ) Exact Size: 17-1/2 x 17-1/2 x 7/8 $39.98
$3998
current price $39.9818x18x1 MERV 10 Pleated HVAC Air Filters by Glasfloss. ( Quantity 5 ) Exact Size: 17-1/2 x 17-1/2 x 7/8
Filter King 4x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 4 x 18 x .75" $66.56
$6656
current price $66.56Filter King 4x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 4 x 18 x .75"
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