20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES return grille + Product Details Size -

+ Product Details Size - 6"w X 16"h X 2"d (for duct opening measurement only)

+ Product Details Size – 25"w X 6"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 8" duct openings

+ Product Details Size – 26" x 36" or 36" x 26" is the size for the duct opening measurement only

} + Product Details Size & Compatibility - The size of a boot register end is 12" X 4" X 6" galvanized floor boot end center 26-gauge

20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES return grille + Product Details Size -+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 20. 5"h] Actual Filter Size 19 3 4"w x 17 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,