36"W X 28"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 29.75"H] fixed bar + Product Details Size -

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

+ Product Spec Sheet Floor Register Spec Sheet

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

Works for all Air Conditioning applications including Ductless Mini-Split

but you will appreciate the benefits over the period of time

36"W X 28"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 29.75"H] fixed bar + Product Details Size -+ Product Details Size 36"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 75" width X 29. 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