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  1. #14
    Join Date
    Jul 2004
    Location
    MN
    Posts
    17
    OK, so I found a Broan mechanical humidistat (de-humidistat, actually) that I connected to the fan. But the point where it clicks on and off does not agree with the electronic temp/humidity meter I have (old radio shack item). The humidistat clicks on at what is marked as 45% on its scale when the electronic meter is reading 25%. If I set it to the desired 25% on the humidistat, the fan runs forever and the electronic meter eventually goes down to 20% and then eventually reads "L%" which I assume means too low for it to measure. Which one is likely more accurate?

    Are the simple mechanical humidistats calibrated only for room temp? The thermostat and electronic meter both agree that its 53 degrees in the garage.

    Based on the condensation and ice on the windows, I tend to believe the electronic meter, but I want to use the humidistat to control the fan. Is this typical and just take that into account when setting the knob, or should I look for a more accurate humidistat?

    - Rick

  2. #15
    Join Date
    Oct 2007
    Posts
    226
    Quote Originally Posted by keeney View Post
    OK, so I found a Broan mechanical humidistat (de-humidistat, actually) that I connected to the fan. But the point where it clicks on and off does not agree with the electronic temp/humidity meter I have (old radio shack item). The humidistat clicks on at what is marked as 45% on its scale when the electronic meter is reading 25%. If I set it to the desired 25% on the humidistat, the fan runs forever and the electronic meter eventually goes down to 20% and then eventually reads "L%" which I assume means too low for it to measure. Which one is likely more accurate?

    Are the simple mechanical humidistats calibrated only for room temp? The thermostat and electronic meter both agree that its 53 degrees in the garage.

    Based on the condensation and ice on the windows, I tend to believe the electronic meter, but I want to use the humidistat to control the fan. Is this typical and just take that into account when setting the knob, or should I look for a more accurate humidistat?

    - Rick
    I don’t think anyone can or will answer your question since it’s kind of obvious you have a DIY project going on and it’s against site rules to answer such questions. Not trying to give you a hard time but I can never understand why floor drains aren’t installed in setups like yours. This is actually a rather common problem that many don’t anticipate.

    heated garage floor + melted snow off vehicles = major mold problems.

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