Aprilaire 401 Filter Media Aprilaire SpaceGard 2400

Genuine Aprilaire 401 air filter is the original OEM expandable "accordion" style high efficiency replacement filter media for the Aprilaire (Spacegard) models 2400 whole house air cleaners.

The 401 replacement filter has a rating of MERV 10. The sizes of the 401 replacement accordion style filter are approximately 3” x 26 1/2" x 6 1/8” collapsed and 16” x 27” x 6 1/8” expanded. The filter ships like a collapsed accordion and is expanded into a plastic frame within the air cleaner cabinet.

The manufacturer recommends changing the filter media every 1 to 2 years depending on the operation of your heating and/or air conditioning system.