Radiant (underfloor) heating is a type of heating system that is placed below the floor of a building. Radiant heating as a technology is the method of intentionally using the principles of radiant heat to transfer radiant energy from an emitting heat source to an object. Radiant heating may be either hydronic (water/fluid flowing through pipes) or electric (electric resistance heating elements).
The temperature of the floor surface is the key to determining what level of comfort is necessary. End-users may feel uncomfortable when coming in contact with floor surfaces that are too warm or too cool. Thermal comfort is defined by building scientists and health care professionals as “a condition of mind that expresses satisfaction with the thermal environment.” Radiant heating and cooling systems are commonly used when addressing human thermal comfort (even though radiant cooling systems are never recommended for use under wood flooring).