Where Can I Find my Filter’s Dimensions?

By HVAC.com on April 2, 2015

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  1. Look for the size printed on the side of the filter’s frame
  2. If the size is not listed look for the model number. The majority of manufacturers will list either the part number or the nominal size (or both) to help customers identify the replacement filter they need.
  3. Good ol’ tape measure. If neither the model number or the size is available, the best way to figure out the dimensions is to physically measure it yourself. Record the exact measurement for length, width and depth of your current filter. This will give you an “actual measurement”. Filters are categorized by their nominal size. To figure out your nominal size click here.

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