Change Return Air Filter Size (smaller surface area - HVAC-Talk

return air box with filter slot   Dan return air support box with filter slot

This return box features a 24 x 25 x 1 filter rack and measures 24 wide, 28 deep, and 18 tall

Slot Cars · Puzzles · RC Model Vehicles, Toys & Control Line · Collectible Card Games 5X18”Tall Galvanized Return Air Filter Box Furnace Stand 4” Filter Rack  Here are features that are specific to home AC intake air filters Air Filter Location AC air filters are often located in a slot behind the air return vent

batman slot car 14 X 14 Steel Return Air Filter Grille for 1 Filter - Removable FaceDoor - HVAC DUCT COVER - Flat Stamped Face -White  I would also just use the usual two filter slots in a box arrangement instead of the cylindrical filter, because it would be easier to build,