18"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 15.875"H] Brown actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

actual front end outer dimensions are approximately 12 5/8" width X 36 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 26" duct opening (measured at the opening)

GPH for highest: 3

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

18"W X 14"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 15.875"H] Brown actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 14 5 8" width X 38 5 8" height actual front end outer dimensions are approximately 12 5 8" width X 36 5 8" height