The SunStar Heating Products Ceramic Heater is ideal for spot heating or area heating of remote locations, farm buildings, shops, service areas, pump houses or other hard-to-heat spaces, providing both fuel efficiency of radiant heat and installation flexibility not recommended for car washes. This is an energy-saving Direct Spark Ignition heater and can be controlled by a line Volt or 24V thermostat sold separately. May require the following second stage regulators prior to the heater based on gas supply pressure A regulator up to 2 PSIG line pressure or a regulator above 2 PSIG line pressure both sold separately. NOT CERTIFIED OR APPROVED FOR RESIDENTIAL USE. Indoor use only. U.S.A. Please review the detailed Installation & Operating Instructions attached for other specific installation req gas pressure, ventilation etc prior to purchasing the heater. Gas Inlet in 1/2, Igniter Direct spark, Fuel Type Natural gas, Heating Capability sq. ft 1,000-3,000, Heat Settings Thermostatically controlled, Vent-Free No, Product Type Radiant heat, Thermostat Not Included, Dimensions W x D x H in 33 x 31 x 11, Blower Not Included, BTU Output 120,000, Remote Not Included, Fuel Consumption gal./hr. 1.2. Constructed from aluminized steel for corrosion resistance and long life Aluminum reflectors are designed to maximize radiant efficiency Heaters can be angled mounted horizontal and up to 30 degrees The min mounting height is 16ft above finished floor for uniform energy distribution and human comfort Requires the following clearances from any combustible material 65in above, 129in below and 49in from the sides of the heater The min supply gas pressure is 7.0in Water Column WC and the Max supply pressure is 14in WC gas pressure If higher gas pressure is supplied, you will need to install a line pressure regulator sold separately to reduce it to less than 14in WC or 1/2 PSIG No assembly required Heaters are 100 test-fired prior to shipment CSA design certified