20" X 36" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Ducting Components Designed for a 1" thick

Designed for a 1" thick filter

ensuring efficient airflow distribution throughout your home or office

Design – Re-configurable/Interchangeable Sections – Easily convertible into 1-Way

Optional Butterfly Damper Available At Asin: B007CNEL1W

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

20" X 36" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Ducting Components Designed for a 1" thick+ Product Details Size 20"w X 36"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 38. 5"h] Actual Filter Size 19 3 4"w x 35 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,