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    cipollina1969's Avatar
    cipollina1969 Posts: 1, Reputation: 1
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    #1

    Feb 26, 2011, 12:15 PM
    Add second thermostat to existing system in upstair room of my two story home
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Feb 26, 2011, 03:30 PM
    It will not work with out a zone control board and dampers.. Many have tried it with out. You have a good chance of low voltage feed back from the thermostats. The climate control of the main level will be erased with no control of temp.
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