16" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Flat Oval- Vertical Elbow Transition +Product Details Size – 4"h Drop Ceilings / Aluminum The set includes a FG1836 HP-1

+Product Details Size – 4"h x 10"w is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 27 5/8" height

+ Product Details Size & Compatibility – The galvanized sheet metal oval stack head is compatible with Duct 7"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

All Our Filter Are Tested Per ASHRAE-52

16" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Flat Oval Vertical Elbow Transition +Product Details Size – 4"h Drop Ceilings Aluminum The set includes a FG1836 HP 1 +Product Details Size – 4"h x 10"w is the size for the duct opening measurement only actual front end outer dimensions are approximately 27 5 8" width X 27 5 8" height