free-cooling

Outside air conditioning

Free-cooling is a method of cooling buildings or equipment using naturally cold outside air or water instead of mechanical refrigeration.

When outdoor temperatures drop low enough, systems bypass energy-intensive compressors and use the ambient cold directly: The data center switches to free-cooling when temperatures fall below fifty degrees.

The term appears in HVAC and industrial contexts where reducing energy consumption matters.

datacenters

economizer

Energy-saving apparatus

wet-bulb temperature · dew point

sustainability

energy savings

Reduced power consumption

ventilation

natural ventilation

Airflow without powered fans

air exchange

Opposites
cooling method/energy source

free-coolingactive cooling

Heat removal requiring power

air conditioning

Family

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Used worldwide · Timeless · Rated G