Infrared is a range in the electromagnetic spectrum. In low frequency (red), it follows the visible range. Infrared rays with a long-wave frequency are emitted by every thermal source. These infrared rays have the property of only heating the bodies on which they fall. The heat transmission via infrared is thus clearly different from the so-called convection, i.e. the heating of ambient air. And: it comes closest to the natural heating principle of the sun that is sensed as the most pleasant source of heat by humans.

The concept of using infrared radiation for heating closed rooms is almost as old as civilisation. Even the Romans knew this principle and used it for tile stoves and their cosy warmth is still valued today. Infrared as a source of heat is also used in halls and other large rooms. Today, infrared heaters are considered to be reliable systems in industry and trade. Here, a law of physics is used which states: the higher the temperature of a source of heat, the lower is its (undesired) convective component and the greater is its (desired) infrared component. The ratio of convection to infrared indicates the quality and efficiency of an infrared system.

Das Prinzip InfrarotIndication of the efficiency of an infrared system: the high tube temperatures. The convective loss thus reduces and the infrared component increases. A physical law consistently implemented in Kübler systems. The outcome: Maximum direct heat at the workplace.