Through striking logical errors and questionable interpretations, radiant heat is misjudged both theoretically and practically, leading to significant disadvantages. This inevitably results in many participants having misconceptions and making erroneous recommendations. There is already a lot of technical nonsense as well as countless confusions and misunderstandings present. Radiant heating is in the crosshairs of a heating industry that largely favors convection heating and is stubbornly trying to defend its once-gained markets. It is essential to shed light on the produced nebulous darkness surrounding the desirable and humane heating technology of radiant heating. Content: - The task and state of science - The physics of radiation - Misconceptions in the heating industry - DIN positioning - The practice of radiant heating.