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thermostats in parallel

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quack24
quack24 Member Posts: 74
was wondering if this would work
put a regular thermostat and this one https://jacksonsystems.com/product/55-degree-temporary-heating-construction-thermostat/ in parallel with each other to protect the building from freezing in case someone shuts the heat

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  • pecmsg
    pecmsg Member Posts: 4,967
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    If they shut off the heat how will it work?
  • ethicalpaul
    ethicalpaul Member Posts: 5,798
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    If by "shuts the heat" you mean they turn down or off the main thermostat, then yes that would work. If they kill the power to the HVAC, as @pecmsg indicates, that won't work.

    NJ Steam Homeowner.
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    mattmia2HomerJSmith
  • Motorapido
    Motorapido Member Posts: 307
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    I use two thermostats, in parallel. The primary thermostat is a Honeywell Lyric wifi thermostat. I like the daily usage data and the ability to change the temperature remotely, from my phone. However, I live deep in the woods, where power outages are frequent, and despite having a whole-house generator, I still wanted an additional backup to make sure my pipes don't freeze. My heat source uses a millivolt gas valve, which functions without any external power, so it works during power outages. The millivolt thermostat that I connected in parallel with the wifi thermostat is a low-temperature model, going down to 40 degrees. I keep the millivolt thermostat set to 50. That way, if power goes out and my automatic whole-house generator fails to turn on, the no-power-needed millivolt thermostat ensures that the temperature won't fall below 50.
    The product in your link appears that it would work in the same method as any thermostat, so I don't see why you can't wire it in parallel with your primary thermostat to guarantee that the temperature will never fall below 50.
  • quack24
    quack24 Member Posts: 74
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    thanks all
    when i said shuts the heat i meant turns it off from the thermostat