Portable radiant heat. Multi-position heat settings of 4,000, 9,000 and 18,000 BTU/HR control comfort level. Features an indoor safe, low oxygen safety shut-off (O.D.S.), and tip-over safety shut-off. Connects directly to two 1 lb. disposable cylinders or to a 20 lb. cylinder w/optional hose. (CYLINDER NOT INCLUDED). SPECIAL FEATURES: Ergonomic easy-carry handle, low oxygen shut-off pilot safety system for indoor and outdoor use. Uses optional A/C adapter or 4 D cell batteries to power blower fan. Porcelain coated reflector for extended life. High-temperature coated safety wire guard. Non-skid surface pads for extra stability. Rear mounting holes for wall mounting. Not designed for use above 7,000 feet. CSA certified for indoor use.R SALE IN MASSACHUSETTS OR CANADA).