20" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3-Pack Check Valve Installation: Verify that

Check Valve Installation: Verify that the check valve is correctly installed and the pump-mute wedge is integrated with the valve

+ Product Details Size - 10"w X 24"h is the size for the duct opening measurement only

Filter Size - 19

+ 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"

20" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 3-Pack Check Valve Installation: Verify that+ 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,