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Too many TSTATs ...

Folks. I've got a 6 zone hydronic heating system and 3 zone ducted heat pump system (primarily for AC) all with independent TSTATs. Any ideas re: how I can consolidate to less than 9 TSTATs? Thank you


  • ratio
    ratio Member Posts: 3,402
    Do the heating zones & cooling zones overlap more-or-less 1:1? You'll likely run into problems if the zones don't, although averaging sensors may alleviate that.

    Also, what kind of existing controls do you have?

  • woobagooba
    woobagooba Member Posts: 171
    Hey Ratio. The zones essentially overlap. The heat pumps are Mitsubishi, the hydronic controls are TBD.
  • ratio
    ratio Member Posts: 3,402
    edited February 2021
    The Mitsubishi PAC-US444CN is an adapter to allow a standard thermostat to control your mini splits, see http://mylinkdrive.com/USA/Controls/InputOutput_Modules/Thermostat_Interface_for_Module/PAC_US444CN_1?product. It will operate them in heating and cooling mode, but NOT with a standard heat pump stat, it does not use an O or B changeover signal. This will make auto-changeover from heat pump heat to hydronic heat difficult.

    You may want to look in to Kumo Cloud (https://www.mitsubishicomfort.com/kumocloud), Mitsubishi's automation framework. I have no experience with this, but IIRC others here do.