The Sunfire 150 Portable Radiant Heater keeps employees warm and productive! Product is portable with solid rubber flat-free tires and an easy-lift handle. It's all-steel frame, welded steel fuel tank, flat-free tires, and standard fuel filter heat makes it rugged and durable even in the toughest of environments. It starts very quickly without that smoke or smell in operation. This product has a BTU/Hour for high 147,000 (43kW), and 130,000 (38kW) for low. This heater requires 120V 2A 60HZ or 12 V Pure Sine Power. Inverter (800W minimum). An empty tank will weigh about 195 pounds and a full one 320 pounds. The flow rate is 1.1 GPH.