Freshen the air in your home or office with our 4 inch air filters. With standard, hard-to-find, and custom sizes available, we know you'll find exactly what you need to improve your air quality. As you increase the MERV rating of your 4 inch furnace filter, the filtration efficiency also increases. Choose the rating that is right for you and best accommodates your individual needs or preferences.
Our 4 inch filters offer the following features:
Our 4 inch filters offer the following features:
- A Variety of Sizes, Including Standard 14x4 Air Filters & Custom Options
- Superior, Made-in-the-USA Quality
- Lower Price than You'll Find Anywhere Else
- 4 MERV Ratings for Enhanced Filtration Efficiency
- 4" Air Filters That Can Reduce Your Energy Costs By Up To 15%
25 x 29 x 4" Filter
From $11
14 x 25 x 4" Filter
$36.06
16 x 16 x 4" Filter
$40.12
20 x 25 x 4" Filter
From $10.78
25 x 25 x 4" Filter
$79.42
20 x 24 x 4" Filter
From $10.78
12 x 24 x 4" Filter
From $9.96
16 x 24 x 4" Filter
From $10.10
16 x 20 x 4" Filter
From $10.02
16 x 25 x 4" Filter
From $10.24
18 x 24 x 4" Filter
From $10.54
20 x 20 x 4" Filter
From $10.68
20 x 30 x 4" Filter
$63.58
24 x 24 x 4" Filter
From $10.82