Ducted/non-ducted telescopic flue accommodates ceiling heights from 8 to 9 feet. Extension flues for higher ceilings are also available for ducted and non-ducted applications., Heat Sentry adjusts speed of blower to high in case of excess heat., Two 20-watt halogen lamps provided., Requires separate purchase of non-ducted kit (RRK51) for indoor exhaust recirculation., Muti-speed slide control., Install hood so that the bottom of the unit in 24 to 30 in. above the cooking surface., 120 Volts. 3.1 Amps. 370 CFM. 6" RD Duct.