The De'Longhi High Performance Radiant Heater, with mechanical controls, is the fastest heater with a revolutionary new design that effectively and efficiently heats cold rooms with 25% more radiant surface. The patented thermal “chimney effect” quickly circulates warmed air throughout the room producing maximum heat with a low surface temperature. Plus, the advanced Eco-Plus function, intelligently selects the ideal power level based on the delta between the current room temperature and the set temperature resulting in 20% - 40% energy savings!