Description
36"W X 25"H (Duct Opening) Return Air Steel Vent Grille HVAC Vent Duct Cover Diffuser (Outer Dimensions: 37.75"W X 26.75"H) w6h6 + Product Details Size MFRG2420W HP + Product Details Size 36"w X 18"h is the size for the duct opening measurement only + How To Measure An Access Panel Overall Size: efficient airflow 000 satisfied customers