Cooling unit
A cooling unit was a device for cooling the temperature in warm spaces as to make them more livable.

During the last stages of the Dominion War, while consulting at the Cardassian Liberation Front base at Vanden Prime, major Kira Nerys, unused to Cardassian temperatures, desired a cooling unit. She was surprised to find that Damar already had one waiting for her. ()

See also 
 Air conditioning

Life support technology