36" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Aluminum For added protection

For added protection

+ Product Details Size - 8"W X 6"H is (for duct opening measurement only)

75"H – fits a 18" X 4" duct opening

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

reduced fire hazards

36" X 12" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Aluminum For added protection+ Product Details Size 36"w X 12"h is the size for the duct opening measurement only, [Outer Dimensions: 38. 5"w X 14. 5"h] Actual Filter Size 35 3 4"w x 11 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,