Hydronic heating systems refer to systems in which space heating is achieved by circulating a hot fluid to radiant heaters. These systems offer an efficient and effective alternative to forced air heating systems.

Basic Operation

Hydronic heating systems typically consist of three primary components: a centralized heating system, a distribution system and a heat exchange system. Various options for each of these subsystems exist.
In the centralized heating system a heat source is used to heat the working fluid (often water) which is then pumped, via the distribution system, to the heat exchange system and back to the heating system in a closed loop.
Hydronic systems differ from forced air systems in that they heat a circulating fluid which in turn heats the ambient air in the building or room. In forced air systems, air is heated directly and mixed with ambient air in the building to achieve the desired temperature.