Radiant heating
Radiant heating occurs when a hot surface warms other objects around it. Radiant heating has a long history of use in buildings by the Romans and the Koreans, and is much more efficient than standard ways of heating the air in a building. Underfloor radiant heating is the most common type of radiant heating used in buildings, but wall and overhead radiant heating systems are also used. Radiant heating can also be used to heat outdoor areas.