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Radiator (heating)
Radiators and convectors are heat exchangers designed to transfer thermal energy from one medium to another for the purpose of space heating. The heating radiator was invented by Franz San Galli in 1855, a Prussian-born Russian businessman living in St. Petersburg.〔(Family Sangalli / San Galli )〕
== Radiation vs. convection ==
In practice, the term "radiator" refers to any of a number of devices in which a fluid circulates through exposed pipes (often with fins or other means of increasing surface area), notwithstanding that such devices tend to transfer heat mainly by convection and might logically be called convectors.
The term convection heater or ''convector'' refers to a class of devices in which the source of heat is not directly exposed. As domestic safety and the supply from water heaters keeps temperatures relatively low, radiation is inefficient in comparison to convection.
The international standard for energy efficient consumer products Energy Star recommends placing heat-resistant reflectors between radiators and exterior walls to help retain heat in a room.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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