Radiant heating involves the direct transfer of heat to objects and people through infrared waves. Radiant heating heats the surfaces of the objects themselves, whilst convection heating heats the air in between the objects. Radiant heaters produce an even heat using minimal energy requirements because they do not require fans to distribute heat in the same way as convective heaters do. In large open indoor and outdoor spaces, this heating type is extremely efficient and effective as it provides targeted warmth to the people and objects below, and allows zoning of the heat. Radiant heat is the only viable option for heating outdoor spaces where there is considerable air movement, as heated air through convective heating rises to the ceiling or is lost through poor insulation, rather than remain in the area that people occupy.