Diagnosing Whole Home Humidifer

Discussion in 'Off-Topic' started by AgronAlum, Nov 12, 2019.

  1. AgronAlum

    AgronAlum Well-Known Member

    Jul 12, 2014
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    I’ve replaced the filter each time I’ve fired up the furnace at the beginning of the year.
     
  2. 1100011CS

    1100011CS Well-Known Member
    SuperFanatic SuperFanatic T2

    Oct 5, 2007
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    At my last house we had one that was installed on the cold/return side too. It didn't make any sense to me. The water is being put into the air before being 'burnt up' in the furnace. Seemed really inefficient.
     
  3. herbicide

    herbicide Well-Known Member

    Mar 23, 2006
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    It won't "burn up" in the furnace, it just won't be as effective humidifying the air. The warmer the air the more water it can hold.

    This chart demonstrates why you want the humidifier acting on the hot side:

    [​IMG]

    This concept is why air conditioners in the summer remove humidity, and why dew and frost form as well. And of course why you'd want a humidifier in the first place, as the cold air outside is naturally dry in terms of actual moisture content.
     
  4. 2forISU

    2forISU Well-Known Member

    Oct 8, 2008
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    That was my problem and I had to bypass the control that was provided for the humidifier and use the Nest control settings, plus I had to have the fan blowing for the humidifier to work. There are numerous videos out there on this, but here is reddit column on this.

     
  5. NickTheGreat

    NickTheGreat Well-Known Member

    Jan 17, 2012
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    Mine also has this. It could explain your predicament. It should be turned "off" in the summer, so maybe the AC guys did that for you?
     
  6. 2forISU

    2forISU Well-Known Member

    Oct 8, 2008
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