20" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3-Pack + Product Details Size -

+ Product Details Size - 36"w X 28"h is the size for the duct opening measurement only

+ Product Details Size & Compatibility – The size of the side round ceiling box is 12" X 12" X 5" and it is compatible with duct 5"

+ Product Details Size – 20"w X 4"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 4

Filter Size - 19

20" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3-Pack + Product Details Size -+ Product Details Size 20"w X 24"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 26. 5"h] Actual Filter Size 19 3 4"w x 23 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,