In the hvac industry, the term "hydronics" refers to any technology that distributes heat (or cooling) using water as the transport medium. Think of a hydronic system as a conveyor belt for thermal energy; the energy can come from a variety of sources and can be released through an equally wide variety of heat emitters (or heat absorbers, in the case of cooling).

JLC readers are familiar with radiant floor heating, the most widely marketed hydronics technology in recent years. During the late 1990s and the early 2000s, hydronic radiant heating saw annual growth rates above 25 percent. The subsequent downturn in residential construction inevitably took its toll on this trend. While hardware for hydronic...

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