18x1(52)
Uses item details. Price when purchased online
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $33.20 $5.53/count
Sponsored
$3320
current price $33.20$5.53/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 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
43.5 out of 5 Stars. 4 reviews
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack $43.98 $7.33/count
Sponsored
$4398
current price $43.98$7.33/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, 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
Best seller 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
3454.5 out of 5 Stars. 345 reviews
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Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $33.20 $5.53/count
$3320
current price $33.20$5.53/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
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
5514.7 out of 5 Stars. 551 reviews
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AAF 118181 Air Filter, 18 in L x 18 in W x 1 in T $41.03
$4103
current price $41.03AAF 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" $59.60
$5960
current price $59.60True Blue 118181 Furnace Air Filter, 18" x 18" x 1"
11 out of 5 Stars. 1 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
Aerostar 18x18x1 MERV 6 Air Filter, Pleated AC Furnace HVAC, Dust Lint Control, 6 Pack From $38.92
Sponsored
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, 4 Pack $40.50
Sponsored
$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
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
Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12 $61.46
$6146
current price $61.46Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12
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.
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
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, 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
43.5 out of 5 Stars. 4 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
3M Filtrete 2017-4 Purple 18" x 18" x 1" MPR 1500 3 Month Air Filter - Quantity of 4 $129.89
$12989
current price $129.893M Filtrete 2017-4 Purple 18" x 18" x 1" MPR 1500 3 Month Air Filter - Quantity of 4
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $35.95 $5.99/count
Sponsored
$3595
current price $35.95$5.99/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
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.
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
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
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.
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 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 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 6 Pack $43.98 $7.33/count
$4398
current price $43.98$7.33/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 14x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $47.48 Was $72.45 $7.91/count
Sponsored
Now$4748
current price Now $47.48, Was $72.45$72.45
$7.91/count
Aerostar 14x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack
214.6 out of 5 Stars. 21 reviews
Clorox 18x18x1 Air Filter MERV 8 Dust & Lint Defense HVAC Furnace Filters, MPR 600 & FPR 5, 4 Count From $34.99
Sponsored
From$3499
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
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)
44.5 out of 5 Stars. 4 reviews
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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
Aerostar 18x18x1 MERV 11 Air Filter, Pleated AC Furnace HVAC, Pet Dander Mold Smoke, 4 Pack $35.95 $5.99/count
$3595
current price $35.95$5.99/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 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
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
Flanders 10055.011418 Standard Grade EZ Flow II Furnace Filter 12/Pack, 18" x 14" x 1" - Lot of 12 $42.35 Was $70.82
Now$4235
current price Now $42.35, Was $70.82$70.82
Flanders 10055.011418 Standard Grade EZ Flow II Furnace Filter 12/Pack, 18" x 14" x 1" - Lot of 12
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.
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
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"
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"
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
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
SpiroPure 18X18X1 MERV 11 Pleated Air Filters - Made in USA (6 Pack) From $47.44
3 options
Available in additional 3 optionsFrom$4744
SpiroPure 18X18X1 MERV 11 Pleated Air Filters - Made in USA (6 Pack)
15 out of 5 Stars. 1 reviews
18x18x1 (17_3/4x17_3/4) Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack From $54.99
5 options
Available in additional 5 optionsFrom$5499
18x18x1 (17_3/4x17_3/4) Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack
18x18x1 (17_3/4x17_3/4) Pleated Air Filters MERV 13 Plus Carbon 4 Pack From $57.99
4 options
Available in additional 4 optionsFrom$5799
18x18x1 (17_3/4x17_3/4) Pleated Air Filters MERV 13 Plus Carbon 4 Pack
Other options to consider(359)
Best seller Filtrete 18x18x1 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 18x18x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
4284.4 out of 5 Stars. 428 reviews
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Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter From $18.47
3 options
Available in additional 3 optionsFrom$1847
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
6254.8 out of 5 Stars. 625 reviews
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Best seller Filtrete 14x18x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter From $11.88
2 options
Available in additional 2 optionsFrom$1188
Filtrete 14x18x1 HVAC Furnace Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
5754.5 out of 5 Stars. 575 reviews
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AAF Flanders EZ Flow II MERV 4 Fiberglass MERV 1 Air Filter, 18x18x1 $44.91 $144.87/lb
$4491
current price $44.91$144.87/lb
AAF Flanders EZ Flow II MERV 4 Fiberglass MERV 1 Air Filter, 18x18x1
73.1 out of 5 Stars. 7 reviews
Best seller Filtrete 14x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter From $18.47
2 options
Available in additional 2 optionsFrom$1847
Filtrete 14x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
2054.8 out of 5 Stars. 205 reviews
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Best seller Filtrete 14x18x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
$564
current price $5.64Filtrete 14x18x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
4584.6 out of 5 Stars. 458 reviews
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Filterbuy 18x18x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack) $10.97 $10.97/in
$1097
current price $10.97$10.97/in
Filterbuy 18x18x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack)
1724.7 out of 5 Stars. 172 reviews
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Aerostar 18x18x1 MERV 6 Air Filter, Pleated AC Furnace HVAC, Dust Lint Control, 6 Pack From $38.92
2 options
Available in additional 2 optionsFrom$3892
Aerostar 18x18x1 MERV 6 Air Filter, Pleated AC Furnace HVAC, Dust Lint Control, 6 Pack
724.7 out of 5 Stars. 72 reviews
Simply Filters 18x18x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (2 Pack) From $24.60
5 options
Available in additional 5 optionsFrom$2460
Simply Filters 18x18x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (2 Pack)
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen, and Pet Dander Reduction, 6 Pack From $26.89
2 options
Available in additional 2 optionsFrom$2689
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 700 MERV 8, Dust, Pollen, and Pet Dander Reduction, 6 Pack
95 out of 5 Stars. 9 reviews
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Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Premium Allergen, Bacteria and Virus, 6 Pack $72.64 $12.11/ea
$7264
current price $72.64$12.11/ea
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Premium Allergen, Bacteria and Virus, 6 Pack
6454.8 out of 5 Stars. 645 reviews
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Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack $34.96
$3496
current price $34.96Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
4274.8 out of 5 Stars. 427 reviews
Simply Filters 18x18x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter (6 Pack) From $29.97
6 options
Available in additional 6 optionsFrom$2997
Simply Filters 18x18x1 MERV 11, MPR 1000, AC Furnace HVAC Air Filter (6 Pack)
Clorox 18x18x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count From $34.99
4 options
Available in additional 4 optionsFrom$3499
Clorox 18x18x1 Air Filter MERV 13 Virus & Bacteria Defense HVAC Furnace Filters, MPR 1900-2200 & FPR 9-10, 4 Count
55 out of 5 Stars. 5 reviews
6 Pack of 18x18x1 MERV 10 Pleated Air Filters by Glasfloss. Actual Size: 17-1/2 x 17-1/2 x 7/8 $41.95
$4195
current price $41.956 Pack of 18x18x1 MERV 10 Pleated Air Filters by Glasfloss. Actual Size: 17-1/2 x 17-1/2 x 7/8
104.8 out of 5 Stars. 10 reviews
Filter King 18x18x1 Air Filter | 3-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $48.06
$4806
current price $48.06Filter King 18x18x1 Air Filter | 3-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
Filter King 18x18x1 Air Filter | 12-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $124.68
$12468
current price $124.68Filter King 18x18x1 Air Filter | 12-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
Aerostar 8x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $98.79 $24.70/count
$9879
current price $98.79$24.70/count
Aerostar 8x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
11 out of 5 Stars. 1 reviews
Filter King 18x18x1 Air Filter | 2-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $35.44
$3544
current price $35.44Filter King 18x18x1 Air Filter | 2-PACK | MERV 8 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
E-Z flow II 18x18x1 Air Filter Pack of 12 $37.01 Was $44.24
Now$3701
current price Now $37.01, Was $44.24$44.24
E-Z flow II 18x18x1 Air Filter Pack of 12
18x18x1 Air Filter Glasfloss GDS Series Disposable - Case of 12 $71.52
$7152
current price $71.5218x18x1 Air Filter Glasfloss GDS Series Disposable - Case of 12
18x18x1 (17_3/4x17_3/4) Pleated MERV 12 Air Filters 6 Pack From $41.99
5 options
Available in additional 5 optionsFrom$4199
18x18x1 (17_3/4x17_3/4) Pleated MERV 12 Air Filters 6 Pack
15 out of 5 Stars. 1 reviews
18x18x1 (17_3/4x17_3/4) Pleated MERV 10 Air Filters 12 Pack From $39.99
5 options
Available in additional 5 optionsFrom$3999
18x18x1 (17_3/4x17_3/4) Pleated MERV 10 Air Filters 12 Pack
25 out of 5 Stars. 2 reviews
Filter King 18x18x1 Air Filter | 12-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $80.88
$8088
current price $80.88Filter King 18x18x1 Air Filter | 12-PACK | MERV 8 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
18x18x1 (17.75 x 17.75) PURAFILTER 2000 Allergen 8000 MERV 8 Air Filter $83.56
$8356
current price $83.5618x18x1 (17.75 x 17.75) PURAFILTER 2000 Allergen 8000 MERV 8 Air Filter
15 out of 5 Stars. 1 reviews
18x18x1 (17_3/4x17_3/4) Pure Carbon Odor Reduction Furnace Air Filters 6 Pack From $53.99
3 options
Available in additional 3 optionsFrom$5399
18x18x1 (17_3/4x17_3/4) Pure Carbon Odor Reduction Furnace Air Filters 6 Pack
14 out of 5 Stars. 1 reviews
Filter King 18x18x1 Air Filter | 12-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $118.92
$11892
current price $118.92Filter King 18x18x1 Air Filter | 12-PACK | MERV 13 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
(4 pack) Filtrete 18x18x1 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 18x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen, Bacteria and Virus, 1 Filter
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Filter King 18x18x1 Air Filter | 6-PACK | MERV 13 | HVAC Pleated AC Furnace Filters | MADE IN USA | Actual Size: 18 x 18 x .75" $105.90
$10590
current price $105.90Filter King 18x18x1 Air Filter | 6-PACK | MERV 13 | HVAC Pleated AC Furnace Filters | MADE IN USA | Actual Size: 18 x 18 x .75"
25 out of 5 Stars. 2 reviews
18x18x1 (17_3/4x17_3/4) Pleated MERV 8 Air Filters 12 Pack From $39.49
5 options
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18x18x1 (17_3/4x17_3/4) Pleated MERV 8 Air Filters 12 Pack
44.8 out of 5 Stars. 4 reviews
Simply Filters 18x18x1 MERV 13, MPR 1500, AC Furnace HVAC Air Filter (4 Pack) From $32.54
6 options
Available in additional 6 optionsFrom$3254
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Chenzhit 18x18x1 (6-Pack)Furnace Air Filters, MPR 1900 & FPR 10, MERV 13 Pleated Air Filter (Actual Size: 17.75x17.75x0.75 inch) $49.00
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current price $49.00Chenzhit 18x18x1 (6-Pack)Furnace Air Filters, MPR 1900 & FPR 10, MERV 13 Pleated Air Filter (Actual Size: 17.75x17.75x0.75 inch)
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18x18x1 (17_3/4x17_3/4) Pleated MERV 7 Air Filters 6 Pack From $38.99
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Available in additional 5 optionsFrom$3899
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Filterbuy 18x18x1 Air Filter MERV 10 Odor Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack $243.96
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current price $243.96Filterbuy 18x18x1 Air Filter MERV 10 Odor Defense, Pleated HVAC AC Furnace Filter Replacement, 12-Pack
Filterbuy 18x18x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack $33.98
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Filter King 35.5x18x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 35.5 x 18 x .75" $91.72
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18X18X1 MERV 13 Pleated AC Furnace Air Filters by Glasfloss Industries. 6 Pack $65.95
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