Lovely little heater/fireplace. Ideal for boats up to 30/36 ft. The combustion process is completely isolated from the inside of the boat by the unique, direct vent design. A built-in blower provides good heat circulation. Heater is sold with all accessories including a stainless steel backing plate and 28" of flexible, double stainless chimney. Safe, easy to use and extremely economical. 7,000-9,700 BTU'S