Mitsubishi Electric's Melcotel controller for individual hotel rooms works with both key card and non-key card systems to ensure that ac is not working needlessly when rooms are empty or windows are open. It can be retrofitted as well as used in new-builds.rnOnce activated, Melcotel will reset the ac to a predetermined setting and monitor the temperatures of unoccupied rooms. The ac will only come on to keep the temperature within a setrnrange. Temperatures are recorded by a sensor and windows can also be connected to the system.
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