28"W X 34"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 29.75"W X 35.75"H] w32h32 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 25"w X 14"h is the size for the duct opening measurement only

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75" width X 21

this coil exceeds the required 700 PSI for R410 with a pressure rating of 2300 to 6500 PSI

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

28"W X 34"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 29.75"W X 35.75"H] w32h32 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 25"w X 14"h is the size for the duct opening measurement only } * ICON * #hvac product accordion