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  1. #1
    Join Date
    Jun 2008
    Location
    Perry Village, Ohio
    Posts
    164

    Confused Thermostat Question

    In being that an air conditioner has two jobs (cool the house and reduce the humidity), it seems that most thermostat's that I have come across as a homeowner are strictly geared towards lowering the temp. Are there also stats out there that will control the compressor based upon AC? Meaning, if I want my house to be 75 degrees and 55% RH, currently, my stat will turn the AC off if it hits the target temp (regardless if the RH is below the threshold or not). Is there something out there that would allow it to continue to run to remove the additional humidity? Or are we talking about a dehumidifier at this point since the house may get too cold?

  2. #2
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964
    The Honeywell VisionPro IAQ will dehumidify by slowing the blower down on a variable speed air handler.

    Good luck.

  3. #3
    Join Date
    Jun 2008
    Location
    Perry Village, Ohio
    Posts
    164
    Okay, but that would only work with a variable speed blower. That I don't have (that I am aware of). I can have a HVAC person come and adjust something internally, but I don't think that makes it variable (correct).

  4. #4
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,376
    Quote Originally Posted by perrybucsdad View Post
    Okay, but that would only work with a variable speed blower. That I don't have (that I am aware of). I can have a HVAC person come and adjust something internally, but I don't think that makes it variable (correct).
    The 8301 VisionPro thermostat (which is not the IAQ model) has the ability to overcool by three degrees in order to bring humidity levels down. What this means is that when the temperature set point is reached, if the humidity level is not satisfactory, the system will continue cooling until either a three degree drop occurs, or the humidity setpoint is reached.

    There is a more cost effective way to control humidity in the home. Reduce the amount coming in from outside. Your system will then spend less time wringing it out and more time bringing the temperature down...with less run time.

  5. #5
    Join Date
    Dec 2002
    Location
    Toledo, Ohio, United States
    Posts
    12,921
    Shopbound would you mind calling Twilli sometime as Twilli has a couple of questions regarding that stat....# in profile...thanks
    No Heat No Cool You need Action Fast

  6. #6
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    Quote Originally Posted by shophound View Post
    The 8301 VisionPro thermostat (which is not the IAQ model) has the ability to overcool by three degrees in order to bring humidity levels down. What this means is that when the temperature set point is reached, if the humidity level is not satisfactory, the system will continue cooling until either a three degree drop occurs, or the humidity setpoint is reached.

    There is a more cost effective way to control humidity in the home. Reduce the amount coming in from outside. Your system will then spend less time wringing it out and more time bringing the temperature down...with less run time.
    I know it's a minor mistake, but just for sake of clarity, the correct model would be the VisionPRO 8321.

  7. #7
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,805
    LOL.. Yep, its TH8321, 3 stage heat, 2 stage cool, plus over cool to dehumidify.
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