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Humidity and A/C Issues
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kpwickham
Mueller Community

Posts: 22
Joined on August 31st, 2008
Humidity and A/C Issues
by kpwickham on July 13th, 2010

 
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sadie minkoff
Mueller Community

Posts: 13
Joined on May 24th, 2010
Humidity and A/C Issues
by sadie minkoff on August 9th, 2010

We have a distribution issue in the upstairs master bedroom. It is hotter than the rest of the house in the summer and colder in the winter. We have very big windows so considered that the temp diff was due to them but we have the same windows downstairs and there does not seem to be a problem. We also installed floor to ceiling drapes but no change. Very frustrating. Have talked to others on our block with the same issue.
Let us know if you come up with a solution.
Thanks!
 
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dhs
Mueller Community

Posts: 179
Joined on January 5th, 2009
Humidity and A/C Issues
by dhs on August 9th, 2010

I've noticed that the humidity has been noticeably worse this year, but my maximum humidity has been less than your minimum, so I'm not sure what to suggest. My house is smaller and two stories, so I don't think the energy usage would be comparable.

wrt: distribution problems - This problem is probably due to the dampers which are supposed to modulate air flow in your HVAC system. The dampers should "even out" the amount of air reaching the individual rooms.

This is what my inspector found when he did my one year inspection. Even with the heat turned off upstairs, he was able to measure significant heat leakage at each vent.

Weekley has had a continual problem with uneven heating and cooling, but unfortunately they won't fix it, even if you purchased one of their HVAC upgrade packages which are supposed to provide more even heating and cooling.

If you don't have a Weekley home, you might check with the builder to see if they'll cover this under their warranty. And I know of one homeowner who had this problem fixed by a separate service company - send me mail if you want details of what they had done.

Doug
 
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Ashley
Mueller Community

Posts: 242
Joined on September 16th, 2007
Humidity and A/C Issues
by Ashley on August 10th, 2010

We are in a Meritage and had problems with our damper (we are in a two story, and are able to control the upstairs and downstairs separately). Our damper was stuck open, causing problems.

We had the company that originally installed the system come out to look at it. We are out of our official warranty period with the builder, but the part was warrantied through the AC company. We did still have to pay for the labor, but at least we were not charged for the part.

Now that the damper is replaced, it seems to be working well.

Ashley
 
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dhs
Mueller Community

Posts: 179
Joined on January 5th, 2009
Humidity and A/C Issues
by dhs on August 11th, 2010

The damper(s) does appear to be the cause of a lot of the uneven heating/cooling problems here at Mueller. Who did the AC work for you? I've been unhappy with the expertise and responsiveness of Weekley's HVAC contractor. Upgrade or not, this is a problem that shouldn't exist in the first place.

To get back to the original question, I wonder if the excess humidity might also be a ventilation issue in the attic. Because of the "tightness" of our homes, air doesn't circulate as well, and I have my fan set to "recirc" or, in really hot weather, I set it to on, and that seems to help.

Doug
 
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Ashley
Mueller Community

Posts: 242
Joined on September 16th, 2007
Humidity and A/C Issues
by Ashley on August 11th, 2010

We used CASA Mechanical, who installed the Meritage systems (at least they did in Phase 1) http://www.casamechanical.com/

Not sure how they compare to others, but I was happy with their work.

First, I did try calling a highly recommended local repairman, but he was very honest with me and said our system was more high tech than what he was used to dealing with and that he may not be the best person to look at it, so I went with CASA.

 
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smlynntx
Mueller Community

Posts: 94
Joined on May 17th, 2009
Humidity and A/C Issues
by smlynntx on April 18th, 2012

I am having the same humidity issue as kpwickham where the humidity is all of the sudden staying around 65%. Before a couple months ago, the humidity has always been around 45% year-round for the three years I've been in the (new) house. I logged on to search for similar issues, and read about the Honeywell thermostat issues (which I don't have), and then found this one above posted by kpwickham.

I called Christianson A/C out (who installed it) last week and they inspected everything. Everything was in "top shape" according to him. He inspected everything in the attic, the compressor on the side of the house, the damper, the A/C vents. The first thing he told me when he got there was "I might not find anything wrong and by the way it's $69 just for us to come out". He turned my A/C down to 70 (which I never turn that low) and the humidity did go down to 60%, but that still doesn't solve the problem. I've also tried just using air-circulation versus auto, and the fresh air valve is off.

Does anyone have any suggestions or maybe I missed a thread already on this website?
 
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Ms Ice Monkey
Mueller Community

Posts: 460
Joined on November 18th, 2007
Humidity and A/C Issues
by Ms Ice Monkey on April 18th, 2012

I'd be inclined to take a wait and see approach at this point, especially since you've had the HVAC system checked out. We've been having gorgeous weather lately, the kind where the A/C doesn't have to cycle on often if at all since our homes are well insulated. My thermostat reads 54% humidity right now, which is higher than usual for us but not uncomfortable. Indoor humidity should decrease as the weather gets warmer and the A/C runs more frequently.

Running the fan on the HVAC unit won't help any, but running your exhaust fans when showering, bathing, cooking, or doing laundry will.
 
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smittyhoo
Mueller Community

Posts: 445
Joined on November 4th, 2008
Humidity and A/C Issues
by smittyhoo on April 19th, 2012

What she said.
 
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Chester Gilmore
Ina Gibbs

Posts: 1
Joined on March 27th, 2020
Humidity and A/C Issues
by Chester Gilmore on March 27th, 2020

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