The indoor safe, 11,000 BTU High Performance, Omni-Directional Mesh Burner provides high intensity radiant heat in a full 180 ° spread so everyone can enjoy the warmth! With integrated gas powered accessory controls and a quick connect accessory rail system, you're safe and ready to go in any weather conditions and any event! Mr. Heater's Trusted - Advanced Safety Detection Systems, including; Emergency Low Oxygen Safety System, Apex 50 ° Tip-Switch and Thermal Shut-Down System, you and your family are safe.