30"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 31.75"W X 13.75"H] Insulated Line Set The operable dampers

The operable dampers

Example: If your hole is 20" wide by 14" tall

and slashes energy costs

+ Product Details Size – 15" Corner Baseboard Grille - White - HVAC corner vent cover

The premium plated finish and modern design make it a luxurious and impressive addition to your home decor

30"W X 12"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 31.75"W X 13.75"H] Insulated Line Set The operable dampers+ Product Details Size 30"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 75" width X 13. 75" height. Design Easy unrestricted airflow for your HVAC system 50 angled to provide maximum airflow. High Quality Solid stamped steel with counter sunk screw holes (screws included) and no sharp edges. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just