Aprilaire 2400 Air Cleaner 29 9/16W x 10D x 17 3/4H Inch Non-Electric Whole-House Air Cleaner
Nordic Pure 20 in. x 25 in. x 6 Aprilaire Space-Gard 2200 Replacement MERV 12 Air Filter (1-Pack) 20x25x6ASGM12-1
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Honeywell POPUP2200, 20 x 25 x 6 inches - MERV 11 Replacement Filter for Aprilaire, Space-Gard (2-Pack) - Hvac Controls - Amazon.com
Filters Fast Compatible Replacement for AprilAire SpaceGard 2200 2250 20x25x6 Air Filter MERV 13 Pleated AC Furnace Air Conditioner Filters Actual Size: 19 3/4 x 24 1/4 x 6 3/8, 2-Pack - - Amazon.com
AprilAire 201 Air Filter for Air Purifier Models 2200, 2250, Space-Gar
How to Upgrade an Aprilaire 2200-2400 Media Air Filter - YouTube
Nordic Pure 20 in. x 25 in. x 6 Aprilaire Space-Gard 2200 Replacement MERV 12 Air Filter (1-Pack) 20x25x6ASGM12-1