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%
14 x 25 x 4" Filter
$18.03
16 x 16 x 4" Filter
$20.06
20 x 25 x 4" Filter
From $5.83
25 x 25 x 4" Filter
$39.71
20 x 24 x 4" Filter
From $5.09
12 x 24 x 4" Filter
From $5.55
16 x 24 x 4" Filter
From $17.49
16 x 20 x 4" Filter
From $4.52
16 x 25 x 4" Filter
From $4.94
18 x 24 x 4" Filter
From $4.82
20 x 20 x 4" Filter
From $4.97
20 x 30 x 4" Filter
$31.79
24 x 24 x 4" Filter
From $5.83