Create Custom Air Filter

Build your custom filter in two easy steps!

How to measure your filter
Step 1:  Enter your filter dimensions (actual) x x
Reset Sizes
Step 2:  Select your performance rating

Good For: 

  • lint
  • dust mites
  • mold spores
  • pollen
  • dust

Good For: 

  • lint
  • dust mites
  • mold spores
  • pollen
  • pet dander
  • dust
  • smoke

Good For:

  • lint
  • dust mites
  • mold spores
  • pollen
  • pet dander
  • dust
  • smoke
  • viruses
  • bacteria
PLEASE NOTE: Custom Filters are only sold in cases of six filters

Create your custom air filter

Additional Info

Nominal Depth 1”
Actual Depth 3/4”
Nominal Depth 2”
Actual Depth 1 3/4”
Minimum Size
5” x 5”
Maximum Size
40” x 40”

Please Note: Due material limitations used to build a custom filter, we construct a double filter (two filters fused together) when any filter dimension is larger than 24.75” on both sides and or larger than 29.75” on one side. Please allow up to an additional five (5) business days for processing your custom filter order.

How to Measure Your Filter

Steps 1 & 2

Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).

Step 3

Measure the thickness (Depth) of your filter from front to back.

Step 4

Put Your measurements together (L x W x D).

Actual Size

A filter’s true dimensions.

Example: 19.75” x 19.75” x 1”

Nominal Size

Rounded numbers used by manufacturers.

Example 20” x 20” x 1”

View Detailed Instructions

What’s the difference between actual and nominal size?

Actual Size

A filter’s true dimensions.

Example: 19.75” x 19.75” x 1”

Nominal Size

Rounded numbers used by manufacturers.

Example 20” x 20” x 1”

Learn More