Hydronics

Hydronics (from Ancient Greek hydro- 'water') is the use of liquid water or gaseous water (steam) or a water solution (usually glycol with water) as a heat-transfer medium in heating and cooling systems.[1][2] The name differentiates such systems from oil and refrigerant systems.

Historically, in large-scale commercial buildings such as high-rise and campus facilities, a hydronic system may include both a chilled and a heated water loop, to provide for both heating and air conditioning. Chillers and cooling towers are used either separately or together as means to provide water cooling, while boilers heat water. A recent innovation is the chiller boiler system, which provides an efficient form of HVAC for homes and smaller commercial spaces.

A hydronic fan unit heater used for maintaining warmth within an industrial setting. The fan draws cool, ambient air through the heat exchanger around the perimeter of the housing with pipes carrying hot glycol, and expels it out the centre.
  1. ^ "2021 Uniform Mechanical Code". epubs.iapmo.org (Code book). IAPMO. 2021. pp. ix, 16. Retrieved 2022-07-22.
  2. ^ Siegenthaler, John (2012). Modern Hydronic Heating (Third ed.). Cengage Learning. p. 3.