20" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Fixed Blades This simple adjustment reduces HVAC

This simple adjustment reduces HVAC strain

Our coils have a very high PSI burst pressure

All steel wire is applied between PET surfaces to prevent corrosion (oxidization)

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

20" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Fixed Blades This simple adjustment reduces HVAC+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 22. 5"h] Actual Filter Size 19 3 4"w x 19 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,