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Humidity sensors

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mattyc
mattyc Member Posts: 44
I have a tekmar 563 thermostat which at the moment does one zone of baseboard only for my house.  There is no central air conditioning.  My house in the winter gets very dry. Usually between 40%-45% humidity in the winter. We get dry skin, bloody noses etc as well as many cracks and gaps that develop in any trim work inside.   I purchased an April air 300 standalone humidifier and will duct it with two registers. One register will go in the living room and one in the bedroom.  I am going to wire the humidifier to my thermostat since it is capable of controlling such a system.  I want to wire two of Tekmar’s 086 humidity sensors to the thermostat. One sensor in the living room and one in the bedroom to make sure one area of the house doesn’t get too much humidity.  My question is, how would you wire multiple sensors to the thermostat and how many sensors could you wire in?  Thanks again. 

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  • hot_rod
    hot_rod Member Posts: 22,327
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    One sensor per stat is what the installation manual shows. If you wired two, which would it respond to?

    https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/81778-source/563-dl-01
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattyc
    mattyc Member Posts: 44
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    @hot_rod. Good point. The thermostat does have a built in sensor but also allows for another wired sensor and I believe it takes the average from both when you set it to that programming. I Was hoping two wired sensors would work the same way.  My thermostat in the hallway is in a good location to maintain accurate temperature but not sure if it would sense accurate humidity throughout the whole house. I can’t move it to the living room which is where I would put one of the humidity sensors because of the fact that I have only one wall and a large TV that was throwing the temperature of the thermostat off.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,710
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    I seriously doubt you will get high humidity. You will find yourself filling the humidifier constantly. And need to run it full blast. Same problem here. Controlling humidity is completely different from temperature.

    Humidity moves by vapor pressure meaning it will leak through every crack and opening it can find losing humidity from high to low.

    Dry air sucks up moisture like a sponge.

    If the rooms are all connected, they will pretty much have the same humidity for that reason especially in a house that is not too big
    mattyc
  • hot_rod
    hot_rod Member Posts: 22,327
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    Unless it could average the humidity levels from 2 inputs, seems it would continue to add humidity until one of the sensors is satisfied.
    No harm is starting with one sensor, see how it works. With only two registers it may or may not blend as evenly. Depends if rooms are doored off from one another.
    I suspect areas of high humidity travel to areas of low humidity. Similar to temperature, pressure, oxygen, etc.
    The say mother nature hates an imbalance and will try to even out areas of differential.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mattyc