20"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 31.75"H] Floor Grille this guard fits almost any

this guard fits almost any thermostat and blends seamlessly into any setting

+ Product Details Size - 36"w X 30"h is the size for the duct opening measurement only

+ Product Description Improve your HVAC system with our high-quality

These are specially sized to fit into all drop ceiling's

20"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 31.75"H] Floor Grille this guard fits almost any+ Product Details Size 20"w X 30"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 31. 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