Introduction To Radiant Cooling

Traditionally, air conditioners (both central systems and stand-alone units) are the main source of providing cool air in residential and commercial structures.  This trend could  change over the next decade with the proliferation of innovative, economical, greener, and healthier cooling sources, such as radiant cooling.

The concept behind radiant cooling is very similar to that of radiant heating.  The biggest difference is that instead of emitting heat, the system absorbs it.  The heat is transferred from the premises and unto the chilled water that is run through the system, resulting on lower temperature of the area that is being cooled.  In many cases, same PEX tubing installation can be used for heating and cooling.  Once the heat is absorbed, the water is being chilled again.  Air-to-water or geothermal heat pumps are commonly used for this purpose.

While both systems were developed around the same time, radiant technology wasn’t applied for cooling applications until about 30 years ago.
One of the reasons behind emerging interest in radiant cooling can be traced to the growing awareness of the negative health effects associated with central air conditioning systems.  These systems, known for circulating cold air, often act as an avenue for spreading various viruses and cause illness.  Radiant cooling, on the other hand, does not involve air circulation, thus greatly reducing the threat of air-borne diseases.

Aside from health concerns, energy savings is a substantial reason for utilizing radiant cooling technology.  Contrary to popular belief, the chilled water does not have to be anywhere near freezing point.  Moreover, water needs to be only a few degrees lower than target temperature and can be as warm as 65 degrees Fahrenheit.  Warmer water means that less energy is required to cool it down.

Radiant cooling encompasses other advantages such as quiet operation, ability to control cooling through different zone controls and lower costs.

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