20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w20h20 + Product Details Size &

+ Product Details Size & Compatibility – The galvanized sheet metal oval stack head is compatible with Duct 8"

Applications – The snap on system makes for easy installation and will prevent the seam from coming apart while also preventing air leakage making your HVAC system more energy efficient and in turn

It is compatible with duct 5"

meticulously designed for optimal HVAC performance

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20" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES w20h20 + Product Details Size &+ Product Details Size 20"w X 18"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 20. 5"h] Actual Filter Size 19 3 4"w x 17 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,