Abstract: The present invention discloses an air conditioning system including at least first and second compressors, at least first and second heat exchangers associated respectively with the at least first and second compressors, at least third and fourth heat exchangers in refrigerant fluid communication respectively with the at least first and second heat exchangers, the at least third and fourth heat exchangers also being in heat exchange communication with a stream of air to be conditioned, an air flow pathway arranged to receive the stream of air downstream of the third and fourth heat exchangers and to direct it to a plurality of enclosures via a plurality of air outlets, and a control system operative to selectably operate the at least first and second compressors, such that none, all or some of the at least first and second compressors operate at a given time.