How To Measure Your Furnace Filter is as Easy As 1, 2, 3!
Step 1.Measure the Length and Width (L x W). If they are not equal, use the smaller measurement as your length.
Step 2.Measure the Depth (D) by measuring the thickness of the filter.
Step 3.Put Your Measurements Together (L x W x D)
Want to know more?Learn about Actual Size vs Nominal Size