Mike Emrich is interviewed about radiant heating technology. In radiantly heated floors, the heat energy is emitted from a warm element (floor, wall, overhead panel) and warms people and other objects in rooms rather than directly heating the air. The internal air temperature for radiant heated buildings may be lower than for a conventionally heated building to achieve the same level of body comfort - which makes this a sustainable technology as the overall heating efficiency increases, and energy consumption decreases.