Broan Elite Rangemaster RMDD3004 30" Downdraft Ventilation System with Internal or External Blower Options Heat Sentry Infinitely Adjustable Control and Optional Remote Button Downdraft ventilator with internal blower exhausts cooktop without overhead hood; Permanently lubricated, thermally-protected motor; Conveniently located button to rise and lower chimney; Chimney rises over 9-1/2 inches when activated, ideal for large pots and pans; Infinitely adjustable control is designed to provide convenient access to govern the blower speed; Heat Sentry adjusts the blower speed to high when excess heat is detected; Height 29.500; Width 30.000; Depth 7.000; Weight 74.00 Compact design and thin profile installs directly behind the cooktop and saves under-cabinet space; Color Stainless Steel; Operating System; Batteries Included; Batteries Required; Number of Batteries 0; Battery Type No batteries required; Language English, Spanish, French; Assembly Required Compatible with most conventional and commercial style cooktops Unique ducting capability allows blower connection to be ducted to the left, right or downward Dynamically-balanced 500 CFM centrifugal blower wheel for quiet, efficient performance