Spot Cooling:
If a particular area ought to be cooled, this will be unwise to cool whole room or factory. In this case, conditions can be kept tolerable for workers through directing a stream of cool air onto occupied areas.
Environmental Laboratories:
The task of air conditioning can vary from one laboratory to the other. In a laboratory, a very low temperature, as - 40oC ought to be maintained to test sure equipment at low temperatures, and in another, a humidity and high temperature can be needed to learned behaviour of animals in tropical climates.