Every day we experience infrared radiation. For example, of the sun, a fireplace or the heat that radiates from the asphalt. Our biggest infrared heating is the sun. Winter sports fans, for example, do not have cold as long as they are in the sun. It’s hot or cold, not only because of the air temperature in the area, but the heat that is stored and reflected through surfaces and people. HeatFun’s infrared heater works on the same principle.