Integrated Design: Duct Cover Conceals Ducting, Giving Your Cooking Space A More Professional Appearance Extends Height: The Stainless Steel Duct Cover Matches The Linear Styling Of The Thor Kitchen Professional 30 Inch Vent Hood And Extends To To Fit A 10 Foot Ceiling. Single Piece Duct Cover Dimension: 23 3/16 Inch. Duct Cover (Only) Max Installation Height: 45 3/8 Inch. Installation Height With Trh05 Hood: 61 7/8 Inch Installation Height With Trh06 Hood: 46 3/8 Inch. Width: 29 15/16 Inches Depth: 12 Inches