28" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Blade larger than the same nominal

larger than the same nominal size "plumbing" pipe

+ Product Details Size - 30"w X 40"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

+ Product Details Size & Compatibility – The size of the wall angle register boot is 12" X 6" X 5" and it is compatible with duct 5"

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28" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Blade larger than the same nominal+ Product Details Size 28"w X 14"h is the size for the duct opening measurement only, [Outer Dimensions: 30. 5"w X 16. 5"h] Actual Filter Size 27 3 4"w x 13 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,