"This Dyna Glo Delux Natural Gas Radiant Heater instantly heat areas up to 5900 square feet with 250,000 BTU of clean, efficient radiant heat. Needs Direct Venting No, Blower Included No, Thermostat Included No, Igniter Continuous spark, BTU Output 250,000, Dimensions L x W x H in. 14 11/16 x 14 11/16 x 44 5/16, Clearance from Rear Wall in. 72, Heating Capability sq. ft. 5,900, Product Type Radiant heat, Clearance from Side Wall in. 72, Heat Settings 3, Oxygen Depletion Sensor No. Rugged stainless steel emitter and steel mesh caging Flame out sensor, auto safety shutoff and a large, stable base CSA certified Always be sure that the proper ventilation is being provided"