"The SunStar Garage Tube Heater is ideal for residential garages, vestibules, entryways, workshops, enclosed patios, restaurants, smoking shelters, small greenhouses, hard-to-heat small areas and low-ceiling height applications. Low intensity radiant heat can save up to 30 in fuel savings over convection warm air heating. Requires horizontal vent kit, Item# 29794, or vertical vent kit, Item# 28795 both sold separately. Requires Line Voltage Thermostat, Item# 16284 sold separately or 24V Thermostat, Item# 16342 and a 24V Thermostat Relay Kit, Item# 16289 both sold separately. U.S.A. NOTE In residential garage applications, the heater must be vented outside through sidewall or the roof. In commercial/industrial space heating applications, the heater can be indirectly vented optional exhaust hood sold separately. Please review the detailed Installation & Operating Instructions attached for other specific installation requirements gas pressure, ventilation etc. prior to purchasing the heater. Product Type Radiant heat, Remote Included No, Dimensions W x D x H in. 110 x 18 x 10, Heating Capability sq. ft. 500-2,000, Blower Included No, Vent-Free No, Thermostat Included No, Igniter Direct spark, Fuel Type Natural gas, BTU Output 35,000, Fuel Consumption gal./hr. 0.3, Gas Inlet in. 1/2. Compact size overall length is 110in. for ease of installation Efficiencies range up to 84.5 Installation as low as 8ft. above floor CSA design certified Vacuum System pulls combustion products through the combustion chamber for greater safety, virtually eliminating the possibility of combustion gases leaking into the heated space Solid State Ignition System offers reliable electronic direct spark ignition system with 100 gas safety shutoff control and 30-second pre-purge U-Tube Design provides uniform emitter tube temperatures and energy distribution on the floor, unlike straight tube heaters which are always hotter at the burner end than at the exhaust end Heavy-duty combustion chamber Aluminum reflectors with 97 reflectivity rating Diaphragm safety switch for proof of venting and system indicator lights Includes 36in. stainless steel flexible gas connector 4in. round flue connection 120VAC, 60HZ, 2.4 Amps"