AC Humidity Problems
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- čas přidán 26. 03. 2022
- If you're getting high humidity in your home then there's something wrong with your AC and here's how you fix it.
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Awesome answers guys!
I’m a mechanical contractor in South Florida and in my opinion 60% is too much. 50-55% is ideal and completely achievable. Downsizing the unit and the humidity rising? Something else is going on. Make sure you don’t have the fan set to the on position on the thermostat or blower relay stuck. It could be an attic ventilation issue. I would get a 2nd opinion from another mechanical contractor. We start by data logging the home and attic for a week so we can see what’s really going on. The data will tell us where to go from there. Without data it’s an educational guess.
Is 50-55% humidity achievable, one South Florida, with a single stage unit, without sealing the home, and without installing a dehumidifier?
I like to keep my fan running all of the time to keep he air moving and keep it from feeling less close in my home. My HVAC still cycles on and off to maintain the set temp of course. Is running the fan all of the time a bad idea? I never had trouble doing that in my old house, but where I live now, my HVAC is set at 71 and I have 80%-82% humidity. It does not "feel" like 71 in here. I live in DFW and am beginning to worry big time about the upcoming triple digit heat and high humidity and my electric bill.
Needs a AC system that has a built in dehumidifier.
Hi. I found your channel whilst looking for an explanation as to why my thermostat says it is 71 in my home, but the humidity is 80%, and I do not feel all that cool. Normally, at 73 F I start to feel a little chilled unless I am doing some sort of physical labour. I should be downright cold at 71. Here is the situation. Maybe you can advise me what is happening? I am in DFW.
I lease an approximately 903 sq ft, single story house that was built in 1926. The owners had a brand new all electric HVAC system installed August '23. (I am not sure what tonage it is, but the outdoor unit is pretty large---definitely does not look small. My heating bill this past Winter was outrageous relative to what I use to pay in my last house which was built in the 1960s and had a gas furnace. A friend told me that the high bill was because my furnace is electric. She said electric furnaces are much more expensive to operate and cited how her house which is twice the size of her father's house and a gas furnace costs significantly less to heat than his house which has an electric furnace. I had always had gas furnaces before this, and my bill was never remotely as high as it was last Winter between November and March---close to $300 per month before I dropped the temp to 59 F and kept it there 24/7---and my electric plan is supposedly quite a low rate. Still, I found that to keep the house comfortably warm, the heat had to run at least 50 minutes of every hour---more during the coldest days and nights. Even after dropping the temp to 59 and feeling quite cold in here (the temp in my study for example was a cold 52), my heating bill only dropped to about $240. I was so chagrined. All I could do was to keep the temp set to 59 and do my best to make it through the Winter. I was worried even more about the upcoming hot months because we have triple digit temps with high humidity here pretty much all Summer.
The hot and humid weather began in earnest this past April. I feel hot in the house even though the HVAC is set to 71 and reads a temp of 71 in the living room. I have little table top thermostats in each room of the house. No two areas have the same temp, but all areas have pretty high humidity---talking about 77%-80% as of May 2nd. At 71 I expect to feel uncomfortably cold, yet I feel hot and oily from the humidity. All windows and doors are kept closed, and I try not to go in and out any more than absolutely necessary (I am a retired senior). I am am very nervous to see what my upcoming electric bill will be. How can the temp in the living room, for example, read 71 yet the humidity read 80%-82% ? The HVAC thermostat is in the living room. It seems to me that if the temp is really 71, the the humidity should not read 80%, and I should. not feel uncomfortably warm and oily from the humidity. At 71, I expect the humidity should be in the 40s or 50s. If I start to do any physical labour, I sweat and feel hot.
I am worried since the temps here will soar into triple digits soon. We managed to squeak by in April without any triple digit days, but I think that is because most days were either overcast with rain in the forecast, or a high pressure system had moved in and dropped the outdoor temperature to a very comfortable temp in the lower to mid 60s. We did have some days in the high 90s already in April, though. The daily highs are already changing. We are already getting temps in the mid to high 80s with overcast skies before the heat index is factored in. It is about to turn really hot soon.
I would like to figure out what is going on and if there is anything to do to fix this problem. I love this house and planned to live here for many years to come, but I am beginning to worry that the high cost of trying to heat and cool this house will either force me to move or leave me to feel cold all Winter and terribly hot throughout the hot months.
I appreciate any insights and advice you offer me. Thank you!!
I do indoor air quality assessments in FL and our target humidity parameters are 40-60 percent with anything close to 60 indicating an issue within the space. Anything in the 40s is ideal
Do you actually see homes with indoor humidity levels below 50% in Florida, during peak humidity times of the year?
If my AC cools well, but the lowest dew point it achieves is around 48-49 degrees (48% RH at 70 degrees), can an HVAC tech do something to get my desired dew point of 40-40 degrees? (The condensor coils need to be 4-5 degrees colder)?
Did it work
My upstairs when the air conditioner is on the humidity goes up to 70% and when it’s off it’s 45%. Is there condensation in the ducts adding all that humidity?
9 months later
@@CCCC-tq8yo11 months later
60 percent is way too high mold problems
Are you in Florida? And do you typically see a lower humidity percentage in that?
@@TJ-22 50
@@CCCC-tq8yo can that be achieved with a single stage unit, without home being sealed, and without a dehumidifier?
@@TJ-22🚫single stage systems don’t dehumidify enough. but a two stage or variable speed systems will dehumidifiy long enough,now if you have a single system then it’s ideal to have a whole home dehumidifier ✅