#1 Home Improvement Retailer

Cart

Cart

Home
Heating, Venting & Cooling
Air Filters

18X18X1 AIR FILTERS

Air Filter Depth (in.): 1

Air Filter Depth (in.): 1

Air Filter Size: 18x18

Air Filter Size: 18x18

HDX

HDX

Filter Performance Rating (FPR): 12 - Ultimate

Filter Performance Rating (FPR): 12 - Ultimate

Filter Performance Rating (FPR): 8-9 - Best

Filter Performance Rating (FPR): 8-9 - Best

MERV Rating (Minimum Efficiency Reporting Value): MERV 11

MERV Rating (Minimum Efficiency Reporting Value): MERV 11

15 Results
Filters
Filters
Clear All

Get It Fast

caret-icon

Department

caret-icon
Air Filters

Review Rating

caret-icon
4 & Up3 & Up2 & Up1 & Up

Brand

caret-icon

Price

caret-icon
to

Most Popular Sizes

caret-icon

MERV Rating (Minimum Efficiency Reporting Value)

caret-icon

Filter Performance Rating (FPR)

caret-icon

Contaminants Captured

caret-icon

Pack Size

caret-icon

Air Filter Features

caret-icon

    Sort by

    Top Sellers
Exclusive
18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack)18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack)
(4.7 / 19830)
Model# HDX3P5-011818
$13.97
($4.66 /filter)
Exclusive
18 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 1218 in. x 18 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12
(4.6 / 14548)
Model# HDX1P9-011818
$20.97
Buy 4 or more $10.49
Exclusive
18 in. x 18 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 818 in. x 18 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 8
(4.7 / 28424)
Model# HDX1P5-011818
$5.98
Exclusive
18 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 1118 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11
(4.6 / 14548)
Model# HDX1P7-011818
$15.97
Buy 4 or more $7.99
Exclusive
18 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 (2-Pack)18 in. x 18 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 (2-Pack)
(4.6 / 3478)
Model# HDX2P7-011818
$22.97
($11.49 /filter)
Buy 4 or more $11.49
Exclusive
18 in. x 18 in. x 1 in. Premium Pleated Air Filter FPR 10, MERV 1318 in. x 18 in. x 1 in. Premium Pleated Air Filter FPR 10, MERV 13
(4.6 / 14548)
Model# HDX1P10-011818
$24.47
Buy 4 or more $12.24
Exclusive
18 in. x 18 in. x 1 in. Ultimate Allergen Pleated Air Filter FPR 12, MERV 1318 in. x 18 in. x 1 in. Ultimate Allergen Pleated Air Filter FPR 12, MERV 13
(4.6 / 9693)
Model# 61201.011818
$24.97
Buy 4 or more $12.49
18 in. x 18 in. x 1 in. Fiberglass Air Filter
(3.9 / 18)
Model# 11104-011818
$2.48
Exclusive
17.5 in. x 17. 5 in. x 1 in. Superior Allergen Pleated Air Filter FPR-9, MERV-1217.5 in. x 17. 5 in. x 1 in. Superior Allergen Pleated Air Filter FPR-9, MERV-12
(4.6 / 9693)
Model# 60901.01175175
$18.97
Buy 4 or more $9.49
Exclusive
17.5 in. x 17.5 in. x 1 in. Ultimate Allergen Pleated Air Filter FPR 12, MERV 1317.5 in. x 17.5 in. x 1 in. Ultimate Allergen Pleated Air Filter FPR 12, MERV 13
(4.6 / 9698)
Model# 61201.01175175
$24.97
Buy 4 or more $12.49
18 in. x 18 in. x 1 in. Permanent Washable Air Filter Merv 8
(4.3 / 346)
Model# ES18181
$49.95
Exclusive
17.75 in. x 17.75 in. x 1 in. Premium Pleated Air Filter FPR-10, MERV-1317.75 in. x 17.75 in. x 1 in. Premium Pleated Air Filter FPR-10, MERV-13
(4.6 / 9698)
Model# HDX1P10-0117
$19.40
Buy 4 or more $9.70