AprilAire #401 Filter Replacement Media THUMD200ABM00BA Actual Dimensions 19 3/4" X

Actual Dimensions 19 3/4" X 20 3/4" X 4 15/16"

Variable Speed EBM Motor  for comfortable operation and optimum cleaning efficiency

as to flammability Class 2

Everest SAS-12

Lennox Healthy Climate X8309 Expandable Filter MERV 10

AprilAire #401 Filter Replacement Media THUMD200ABM00BA Actual Dimensions 19 3/4" X#401 Media for Aprilaire Space Gard Models 2400 Air Cleaners These are the original, OEM expandable "accordian" style, factory recommended replacement filters for the Aprilaire Space Gard Model 2400 Air Cleaner. The filters ship like a collapsed accordian and are expanded into a plastic frame within the air cleaner cabinet. The filter is installed within the plastic frame and held in place with your existing pleat spacers(NOT INCLUDED). Assembly