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Old 06-15-2012, 06:35 PM   #1
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does geothermal dehumidify?


Simple question, I know a normal AC does de-humidify, it's normally why I turn it on since I live in a humid area. Does a geothermal unit also de-humidify in the same way or does it cool the air but not reduce the humidity?

links to info supporting would be awesome.

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Old 06-15-2012, 06:41 PM   #2
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does geothermal dehumidify?


It dehumidifies the same. Geo still uses refrigerant to cool it just uses water to transfer the heat outside instead of having an outdoor unit blowing air across coils. Your indoor air blowing over a cold coil is what condenses the humidity out of the air and both do the same in that respect.

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Old 06-15-2012, 06:46 PM   #3
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does geothermal dehumidify?


Follow up question:

if I want to drop the humidity in my house primarily because thats what makes it feel hot, my understanding is that a dehumidifier also heats up the environment (the house in this case) but functions identically otherwise. So would it make more sense to just turn the AC/Geo on rather than turn on an dehumidifier?
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Old 06-15-2012, 06:55 PM   #4
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does geothermal dehumidify?


The geo can remove more moisture and it does the whole house instead of a large room. If it's humid but not hot enough for the geo to run much turn both on.
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Old 06-15-2012, 06:57 PM   #5
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does geothermal dehumidify?


Quote:
Originally Posted by MLMIB View Post
Follow up question:

if I want to drop the humidity in my house primarily because thats what makes it feel hot, my understanding is that a dehumidifier also heats up the environment (the house in this case) but functions identically otherwise. So would it make more sense to just turn the AC/Geo on rather than turn on an dehumidifier?
With that method you could overcool the house. Some T-stats will allow a 3 degree overshoot to try and remove more humidity...
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Old 06-15-2012, 07:20 PM   #6
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does geothermal dehumidify?


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Originally Posted by stickboy1375 View Post
With that method you could overcool the house. Some T-stats will allow a 3 degree overshoot to try and remove more humidity...
I'm trying to look at it from the other side, what is the cheapest way to get to a comfortable feeling in the house.
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Old 06-15-2012, 07:23 PM   #7
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does geothermal dehumidify?


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Originally Posted by MLMIB View Post
I'm trying to look at it from the other side, what is the cheapest way to get to a comfortable feeling in the house.
I run a Whole house dehumidifier, tied into my existing ductwork, my TSTAT controls this unit, The AC will also remove moisture from the air... I like the setup, and keeps my house at 40% humidity... This setup seems to work fine, not sure what it costs, but it keeps the house where I want it temperature and humidity wise.
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Old 06-15-2012, 08:00 PM   #8
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does geothermal dehumidify?


A drop in relative humidity, what ends up make you feel less sticky, is accomplished when the air temperature is raised after cooling below the dewpoint (which draws the water vapor out of the air). I think that's what the dehumidifier accomplishes, condensing the water vapor across the evaporator, and then adding heat back into the air across the condenser side.
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Old 06-15-2012, 09:57 PM   #9
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does geothermal dehumidify?


A whole house dehumidifier would be cheaper to use to dehumidify your house, then using the A/C. Plus it can dehumify your house when your indoor temp is already whee you want it to be, without making your house cooler.

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