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 $31.55 $5.26/count
Sponsored
$3155
current price $31.55$5.26/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
84.5 out of 5 Stars. 8 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
484.8 out of 5 Stars. 48 reviews
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $52.05 $8.68/count
Sponsored
$5205
current price $52.05$8.68/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 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
Best seller Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Basic Dust and Lint, 1 Filter $5.64
$564
current price $5.64Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Basic Dust and Lint, 1 Filter
3504.5 out of 5 Stars. 350 reviews
AAF Flanders (4 Filters), 18" x 18" x 1" Nested Glass MERV 1 Air Filter $15.99 $4.00/count
$1599
current price $15.99$4.00/count
AAF Flanders (4 Filters), 18" x 18" x 1" Nested Glass MERV 1 Air Filter
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack $31.55 $5.26/count
$3155
current price $31.55$5.26/count
Aerostar 18x18x1 MERV 8 Air Filter, Pleated AC Furnace HVAC, Dust Pollen Pet Dander, 4 Pack
84.5 out of 5 Stars. 8 reviews
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergens, Bacteria & Viruses, 1 Filter From $18.47
3 options
Available in additional 3 optionsFrom$1847
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergens, Bacteria & Viruses, 1 Filter
6284.8 out of 5 Stars. 628 reviews
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
18 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 (2-Pack) $30.50
$3050
current price $30.5018 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 (2-Pack)
25 out of 5 Stars. 2 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 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
Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12 $61.45
$6145
current price $61.45Pamlico Air 4011401 18 x 18 x 1 in. Fiberglass 4 MERV Air Filter - Pack of 12
15 out of 5 Stars. 1 reviews
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
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" $44.94
$4494
current price $44.94Filter 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"
164.9 out of 5 Stars. 16 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" $34.28
$3428
current price $34.28Filter 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"
184.9 out of 5 Stars. 18 reviews
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
True Blue 118181 Furnace Air Filter, 18" x 18" x 1" $49.84
$4984
current price $49.84True Blue 118181 Furnace Air Filter, 18" x 18" x 1"
11 out of 5 Stars. 1 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" $33.96
$3396
current price $33.96Filter 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"
164.9 out of 5 Stars. 16 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
484.8 out of 5 Stars. 48 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
45 out of 5 Stars. 4 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
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.
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
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" $53.88
$5388
current price $53.88Filter 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"
274.9 out of 5 Stars. 27 reviews
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack $52.05 $8.68/count
$5205
current price $52.05$8.68/count
Aerostar 18x18x1 MERV 13 Air Filter, Pleated AC Furnace HVAC, Smoke Bacteria Allergy, 6 Pack
43.5 out of 5 Stars. 4 reviews
WJSP Air Filter 18X18X1 inch for Furnace HVAC $48.95
$4895
current price $48.95WJSP Air Filter 18X18X1 inch for Furnace HVAC
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.
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" $44.08
$4408
current price $44.08Filter 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"
334.6 out of 5 Stars. 33 reviews
Reair 18x18x1 Air filter, Washable and Reusable Air Filter 18x18x1 for AC HVAC Furnace, MERV 8 Air Filters Machine Washable & Dryer Friendly, AC Furnace Air Filter From $39.99
Sponsored
From$3999
Reair 18x18x1 Air filter, Washable and Reusable Air Filter 18x18x1 for AC HVAC Furnace, MERV 8 Air Filters Machine Washable & Dryer Friendly, AC Furnace Air Filter
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
Sponsored
$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 | 6-PACK | MERV 11 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 17.5 x .75" $48.96 Was $60.60
Now$4896
current price Now $48.96, Was $60.60$60.60
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"
274.9 out of 5 Stars. 27 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
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.
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.
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.
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
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.
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
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
814.7 out of 5 Stars. 81 reviews
Flanders 84858.011818 18 x 18 x 1 in. NaturalAire Standard Pleated Air Filter - Pack Of 12 $84.56
$8456
current price $84.56Flanders 84858.011818 18 x 18 x 1 in. NaturalAire Standard Pleated Air Filter - Pack Of 12
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 4 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 4 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
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 (17_3/4x17_3/4) Pleated Air Filters MERV 7 Plus Carbon 3 Pack From $49.99
4 options
Available in additional 4 optionsFrom$4999
18x18x1 (17_3/4x17_3/4) Pleated Air Filters MERV 7 Plus Carbon 3 Pack
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Allergens Bacteria, Viruses & Air Pollutants, 6 Pack $11.62 Was $72.64 $1.94/ea
Now$1162
current price Now $11.62, Was $72.64$72.64
$1.94/ea
Filtrete 18x18x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Allergens Bacteria, Viruses & Air Pollutants, 6 Pack
6394.8 out of 5 Stars. 639 reviews
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