This radiant 125000 BTU portable natural gas heater requires no electricity and provides 360 deg of heat, all while operating much quieter than forced air heaters of the same size. With factory installed features, like a tip-over safety switch and a thermoelectric safety valve, the only thing you need to make this heater the most useful tool you own is access to a natural gas supply. Just hook the tank up to your supply, then enjoy the quiet warmth of the Heatstar HS125NG.