The cooling is often accomplished via a refrigeration cycle, but at times evaporation or absolutely free cooling is used. Air conditioning programs can even be produced determined by desiccants (chemical substances which take out humidity with the air). Some AC devices reject or store warmth in subterranean pipes.[2] Incorporating Benefit: https://docs.google.com/spreadsheets/d/1sFkX-195bzbspltn6kI7pJAwHC_IWJIWy0giWMghe84