Variable speed down draft exhaust fan for installation behind a 30" cooktop. Ideal when the cooktop is installed in an island or somewhere that an overhead exhaust fan is inconvenient. When not in use, press a button and the fan retracts to be of similar height as the cooktop. The body of the fan is housed below the counter level and is 27" wide by 7" deep below the counter, and 30" in height overall.