Thermostat. Heats approximately 3000 sq. feet. Runs up to 9.5 hours on full tank. 8.5 gallon fuel tank. CSA certified. Overheat safety shutoff. Continuous ignition. Other features: illuminated on/off switch, fuel gauge, air pressure gauge, cord wrap, easy-off gas cap, dual powder-coated black handles, oversized pneumatic tires, drain plug, electric plug.