Author Topic: Goodman Communicating System - What to set the dehum setpoint at?  (Read 3149 times)

Offline walker

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Whats a typical setpoint to set the dehum at for the summer?

Offline Admin

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #1 on: May 04, 2015, 06:07:34 AM »
What kind of dehumidifier system is installed?  Usually 30-50%RH is a good place to be.

Offline walker

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #2 on: May 04, 2015, 07:36:00 AM »
It just uses the air conditioner with the blower at a reduced speed. I've been told before that 50-60% is good for the summer, but I'm not sure how correct that is.

Offline Porcupinepuffer

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #3 on: May 04, 2015, 09:31:28 AM »
I'm sure it varies customer to customer with different comfort levels and health issues as well as what kind of furniture/flooring they have and its general requirements. I would imagine a person who has dry eye problems would not want dehumidifying at 30%...  I find 50% feels pretty dry.

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #4 on: May 04, 2015, 04:58:14 PM »
Is this a 2 stage air conditioner?

Offline walker

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #5 on: May 04, 2015, 04:59:46 PM »
Nope

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #6 on: May 04, 2015, 05:08:16 PM »
Is this a Goodman GMVC furnace with CTK03 Thermostat?

I've never used dehumidification settings before.  I've only installed single stage AC's but I scanned through the CTK03 manual and I see what you're saying about reduced airflow.  Does this work well with a single stage AC, or does it just overshoot the cooling setpoint and make the house feel cold?

It would be a good option to use for people with ECM blowers and oversized AC's if it works.

Offline walker

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #7 on: May 04, 2015, 05:09:41 PM »
Yes thats the one I'm using.  I installed one in my house so I guess I can be the guinea pig.

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #8 on: May 04, 2015, 05:14:10 PM »
I always undersize an AC rather than oversize.  This seems to solve any humidity problems.  A properly sized AC should maintain 40 - 50% on it's own.  I imagine if you're dehumidification setpoint was at 60%, it would hardly get used.

Offline walker

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Re: Goodman Communicating System - What to set the dehum setpoint at?
« Reply #9 on: May 04, 2015, 05:29:16 PM »
I put a 1.5ton in my 1800 sqft house. I have not run the A/C enough this year to see how the humidity has acted yet.