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  1. #1
    Join Date
    Sep 2009
    Posts
    14

    Humiditrol versus whole home dehu

    Hi, another stupid question about Lennox gear - I'm comparing the "Humiditrol" unit versus their whole home dehumidifier:

    Humiditrol: http://www.lennox.com/products/indoo...ty-systems/HD/

    Healthy Climate Dehu: http://www.lennox.com/products/indoo...systems/HCWHD/

    From what I gather, the Humiditrol has about 3x the moisture removal as the HC dehu.

    This is for a home in CA, where we will have an AC unit in addition to a variable-speed Lennox furnace and a PureAir unit.

    Is the Humiditrol completely overkill for this? It's for a ~3000 sf home (2 level).

    Are there other differences between the two units? Thanks...

  2. #2
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,065
    Quote Originally Posted by jeffinca View Post
    Hi, another stupid question about Lennox gear - I'm comparing the "Humiditrol" unit versus their whole home dehumidifier:

    Humiditrol: http://www.lennox.com/products/indoo...ty-systems/HD/

    Healthy Climate Dehu: http://www.lennox.com/products/indoo...systems/HCWHD/

    From what I gather, the Humiditrol has about 3x the moisture removal as the HC dehu.

    This is for a home in CA, where we will have an AC unit in addition to a variable-speed Lennox furnace and a PureAir unit.

    Is the Humiditrol completely overkill for this? It's for a ~3000 sf home (2 level).

    Are there other differences between the two units? Thanks...
    How much moisture do you need to remove? Was it the size of your a/c? At the end of the cooling/dehumidifing cycle, the Hmdtrl has 4-5 Lbs. of moisture on the cooling coil. As the a/c coil dries between cycles, the moisture slowly evaporates back into your home, rehumidifying it. This reactivates the dehumidistat removing the moisture back onto the coil. This process repeats over and over. Better to have a smaller better sized dehumidifier that does not retain so much moisture. Also there are more reliable dehumidifiers than the Lennox, made by Aprilaire. Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  3. #3
    Join Date
    Oct 2009
    Location
    Murfreesboro, TN
    Posts
    108
    From what I understand about the Humiditrol system offered by Lennox is that it uses the hot return gas through an additional coil in the air stream to heat up the supply air. This allows the air conditioning system to run longer without having to over cool the space in order to reduce the humidity. The heated coil is similar to a commercial VAV reheat system. The real question is which system uses less energy to control moisture. A ThermaStor 90H dehumidifier comes with its own compressor and has been tested to dehumidify 5 pounds of water per kWh at 80F, 60%RH. The Humiditrol uses the existing compressor. The test data available from Lennox uses a Signature series, 3 ton split to dehumidify about 6 pounds of water per kWh at 82F, 60% RH. The efficiency may vary when using a different air conditioning system. Both systems are either on or off. They do not offer any modulation to track a humidity level. That means the humidity in the space may vary 5% to 10% depending on the controller alone. TB may be able to explain this concept another way.

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