"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 windy/drafty environments. This is a Millivolt Standing Pilot heater and does not require an external power or electricity to operate, so it's great for use during power outages. Requires a 750 Millivolt Thermostat to operate sold separately. Indoor use only. 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. 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. Clearance from Corner in. 36, Clearance from Side Wall in. 36, Gas Inlet in. 1/2, BTU Output 52,000, Needs Direct Venting No, Heating Capability sq. ft. 1,500, Product Type Radiant heat, Clearance from Rear Wall in. 36, Regulator Included No, Thermostat Included No, Blower Included No, Igniter Standing millivolt pilot, Dimensions L x W x H in. 40 x 22 x 12. Constructed from aluminized steel for corrosion resistance and long life Aluminum reflectors are designed to maximize radiant output Heaters can be angle mounted horizontally and up to 45 degrees The minimum mounting height is 14ft. above finished floor for uniform energy distribution and human comfort Requires the following clearances from any combustible material 36in. above, 72in. below and 36in. from the sides of the heater The minimum supply gas pressure is 11.0in. 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 Supply pressure of 11in. WC is critical and supply pressure less than 11in. WC can affect the operation of the pilot/heater The standing pilot flame can be affected in windy/drafted areas and not recommended in these environments No assembly required Heaters are 100 test-fired prior to shipment CSA design certified"