20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES w6h6 + Product Details Size –

+ Product Details Size – 12" x 24" or 24" x 12" is the size for the duct opening measurement only

but you will appreciate the benefits over the period of time

+ Product Details Size – 20" x 36" or 36" x 20" is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 31 3/4" x 1"

20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES w6h6 + Product Details Size –+ Product Details Size 20"w X 25"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 27. 5"h] Actual Filter Size 19 3 4"w x 24 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,