One of the common questions we are asked – particularly when someone doesn’t know the dimensions of their air filters is, what are the standard or most common filter sizes. We hope this quick reference chart will help you find just what you’re looking for…
Standard air filter sizes include:
|10 X 20||14 X 20||16 X 24||18 X 30|
|12 X 12||14 X 24||16 X 25||20 X 20|
|12 X 20||14 X 25||18 X 18||20 X 24|
|12 X 24||14 X 30||18 X 20||20 X 25|
|12 X 30||15 X 20||18 X 24||20 X 30|
|12 X 36||16 X 20||18 X 25||24 X 24|
|25 X 25|
Standard Air Filter Dimensions
Our standard air filter sizes are cut nominally, which means they are 1/2 inch undercut, based on industry standards.
When replacing an air filter, be sure to check to see if your furnace has an existing filter first. If so, does it fit properly? Are the corners squashed or has the filter been forced into the system to fit?
Remember, our washable electrostatic air filters feature a durable steel frame – it is far more durable than flexible cardboard.
For example: a 10 X 20 filter will have actual dimensions of 9-1/2 X 19-1/2.
While we do offer standard air filter sizes, we also offer custom sizing on ALL of our air filters.