energy efficient room heaters has a very hot heating element

energy efficient room heaters has a very hot heating element, usually enclosed in a glass tube much like an incandescent light bulb. Behind the tube is a reflective strip of metal which directs most of the radiative energy from the element out the front of the heater. This energy is in the form of infrared radiation . Some of infrared radiation is converted to heat when it strikes a solid object , and some is reflected further. Eventually all of it is converted to heat. infrared heaters combines the processes of convection and radiant heat,reaches full power within minutes.