16" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 12" Round Duct Pipe prime the pump according to

prime the pump according to the manual instructions to remove any air trapped in the system

Our metal and paper diagonal support bars ensure the filter can hold an extra heavy load of dirt

+ Product Details Size - 20"w X 28"h X 2"d (for duct opening measurement only)

these louvers provide exceptional protection against rain and water

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 28" Or 28" x 34" duct opening (measured at the opening)

16" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 12" Round Duct Pipe prime the pump according to+ Product Details Size 16"w X 24"h is the size for the duct opening measurement only, [Outer Dimensions: 18. 5"w X 26. 5"h] Actual Filter Size 15 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,