28" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Copper Coil Drainage Test: Run the pump

Drainage Test: Run the pump for an extended period

Actual Filter Size – 9 3/4"w x 7 3/4" x 1"

It serves as a main duct or plenum

Each grille is carefully packaged with cardboard backing to prevent damage during shipment

Plumbing tubing is measured by it's inside diameter I

28" X 14" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Copper Coil Drainage Test: Run the pump+ 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,