12"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 13.875"W X 15.875"H] d Installation requires cutting into the 4 X 12 Is CRFG2028 Width_14in

Installation requires cutting into the frame of your wall and the metal duct where your HVAC system is located

+ Product Details Size – 28"w X 20"h is the size for the duct opening measurement only

This is an essential component that improves the functionality of your HVAC system and will make your building’s ventilation

Actual Front End Outer Dimensions Are 12" Width X 6" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 36" or 36" x 6" duct opening (measured at the opening)

12"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 13.875"W X 15.875"H] d Installation requires cutting into the 4 X 12 Is CRFG2028 Width_14in Installation requires cutting into the frame of your wall and the metal duct where your HVAC system is located + Product Details Size – 28"w X 20"h is the size for the duct opening measurement only