Specials & Offers
Appliances
Bath
Blinds & Window Treatments
Building Materials
Lumber & Composites
Cleaning
Home Décor
Lighting
Doors & Windows
Electrical
Flooring
Hardware
Heating, Venting & Cooling
Kitchen
Garden Center
Outdoors
Paint
Plumbing
Holiday Decorations
Smart Home
Storage & Organization
Tools
Automotive
Furniture
Home Depot Gift Cards
Credit Card Services
Home Services
Home Depot Rental
Pro Services & Contractor Supply
Project Calculators
DIY Projects and Ideas
Local Ad
Store Finder
Site Map
#1 Home Improvement Retailer
Select store
...
...
Cart
Select store
...
...
Shop All
Services
DIY
Log In
Cart
Home
/
Heating, Venting & Cooling
/
Air Filters
18X18X1 AIR FILTERS
Get It Fast
In Stock at Store Today
Filters
Filters
Clear All
Filter Performance Rating (FPR): 1-3 - Economy
Most Popular Sizes: 18x18x1
Get It Fast
In Stock at Store Today
Department
Heating, Venting & Cooling
Air Filters
Most Popular Sizes
12x20x1
14x20x1
14x25x1
16x25x1
16x20x1
18x18x1
20x20x1
20x25x1
Other Sizes
20x20x2
24x24x1
View Results
All Filters
Most Popular Sizes
Filter Performance Rating (FPR): 1-3 - Economy
Most Popular Sizes: 18x18x1
Clear All
1 Results
Sort by
Top Sellers
$
2
.
48
(9)
18 in. x 18 in. x 1 in. Fiberglass Air Filter
Add to Cart
Installation Services
HVAC Maintenance
A seasonal heating or cooling tune-up can identify potential issues and comes with our 6-month "No Breakdown Guarantee."
Learn More