"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 voltage 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. NOTE Please review the detailed Installation & Operating Instructions attached for other specific installation requirements gas pressure, ventilation etc. prior to purchasing the heater. Vent-Free No, Remote Included No, Gas Inlet in. 1/2, Heat Settings Thermostatically controlled, Igniter Direct spark, Fuel Consumption gal./hr. 1.6, Fuel Type Natural gas, Thermostat Included No, Heating Capability sq. ft. 1,000-5,000, Blower Included No, BTU Output 155,000, Dimensions W x D x H in. 38 x 31 x 11, Product Type Radiant heat. Constructed from aluminized steel for corrosion resistance and long life Aluminum reflectors are designed to maximize radiant efficiency Heaters can be angle mounted horizontally and up to 30 degrees The minimum mounting height is 18ft. above finished floor for uniform energy distribution and human comfort Requires the following clearances from any combustible material 65in. above, 137in. below and 49in. from the sides of the heater The minimum supply gas pressure is 7.0in. Water Column WC and the maximum 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"