Air conditioning is the process of altering air temperature and humidity in an enclosed space to achieve more desirable conditions. In most cases, air conditioners are
used to remove heat from an environment, cooling the space's average temperature.
In HVAC systems, air conditioners provide cooling and humidity control from entire rooms or buildings. Air in the environment is drawn into the air conditioner and cooled through the refrigeration cycle. Refrigerants absorb heat before the air is pumped back into the building, room or space. Modern systems continuously recirculate increasingly cool air until the desired temperature is met.
Air conditioning is most familiar as a human need, but is also very useful for rooms filled with heat-producing electronic devices and equipment like computer servers, power amplifiers, motors and more.