Now is the time to replace your 4-inch filters. Avoid paying for international sourcing and shipping fees by choosing 4-inch air filters from Factory Direct Filters. Each of our products is made in America and manufactured in our own facilities, allowing us to offer you the best price in the market. Our 4-inch furnace filters come in every size, from standard 14x4 air filters to custom measurements you can't find anywhere else in the industry.
Depending on the MERV rating you choose, your 4-inch AC filter can capture and remove a wide variety of debris in your home. After selecting the measurements you need, choose your filtration efficiency and optimal air quality with your preferred MERV rating. If you aren't convinced, check out a few of the features that make our 4-inch air filters exceptional.
Get free shipping and high filtration efficiency with our 4-inch air filters!
Select your specific 4-inch filter measurements below or shop extended sizes.