Vornado AVH2  Whole Room Heater with Auto Climate Control Automatic Vortex Heat technology: circulates warm air throughout the whole room Auto-adjusting climate control: heat output and fan speed are continuously and precisely regulated 5118 BTU/hr maximum output Energy saving by heating the room you're in, not the whole house Automatic tip-over protection: heater shuts off if it is tipped over Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.