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Q: How to deal with cold damp indoor climate in southern China

 

What is the best way to keep the indoor climate as good as possible.Today is 14 degrees outside, relative humidity is about 90%. The result is that in the morning our bedroom windows will be wet. It is not really an option to have the windows open all day, and as the outside is very humid I do not really see the point. We have air-condition units that can cool/heat/de-humidify, we have an extra heater on wheels. How to best use those to keep a health indoor environment and not have to dress like Eskimos. 

9 years 37 weeks ago in  Housing - Zhuhai

 
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Open the window slightly.

 

There's no trick to solve this one, unfortunately. Unless you want to wipe the windows down every hour.

Scandinavian:

But am I not letting in a lot of humid air, in doing so the temperature delta between the two sides of the window will even out, thus the water from the humid air will not condense, but as soon as I close the window the room will get slightly warmer and there will be condensation on the windows

9 years 37 weeks ago
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blaineholloway:

Your body heat is making the windows on the inside get wet, not the outside humid air. When you wake up in the morning, that is why your windows are wet. The warm room meets the cold outside and the moisture in the air condenses into droplets of water. Open the window to cool the room down and the water will go. You may want to give it a hand and wipe it down first because it takes a long time if it's really wet.

9 years 37 weeks ago
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Scandinavian:

but if I open the windows, then I am letting in humid air (humidity here is often 95% on these days) and I am cooling my apartment. I do not want to have to wear winter clothes when indoors

9 years 36 weeks ago
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9 years 37 weeks ago
 
Posts: 72

Governor

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Condensation is caused by warm air touching the cold glass on the windows and I used dehumidifiers in Canada to maintain the humidity inside the house and would never open the windows. Having showers, cooking without extractors and breathing when you are sleeping (LOL) also causes condensation. It is a very tricky problem but as far as I know, the only solution is to use dehumidifiers if you can find them in China; I am in Shenzhen and I haven't seen one yet! Are you in Shenzhen as it is also 14 degrees here? oh, I think you are in beautiful Zhuhai!!.........

Scandinavian:

just outside Shenzhen, so yes. 

 

so, what you are saying, glue the windows shut so noone opens them and then have the air-cons running as dehumidifiers.

I suspect that the locals default reaction of opening the windows was pretty great back in the day when they where living in villages and did not have stuff like computers that does not like humidity.

9 years 37 weeks ago
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raptors:

I have never used the AC unit for condensation problems as I had dehumidifiers in my house and they worked fine for me...........so from my experience, getting a dehumidifier to try to maintain a stable air temperature inside your apartment is your solution...using the AC to dehumidify may be counterproductive as it may also draw warm air from your apartment?..a dehumidifier will also add heat to your apartment.........

9 years 37 weeks ago
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Scandinavian:

you are right that the A/C cannot dehumidify without also cooling, however it is far less than when it is on actual cooling, and I would rather be dry and cold than wet and cold :) 

A dedicated dehumidifier is most likely the better choice, both at a functional level but also in terms of what will happen to the electricity bill

9 years 36 weeks ago
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raptors:

I am in Luohu, Shenzhen and my windows do not have much condensation and I am not running a dehumidifier; maybe I do not breathe at night but I do shower twice a day, lol.........I guess you are from a Scandinavian country and in Zhuhai and should find that there is no need yet for winter clothes indoors; I am from Toronto and is still wearing shorts and a T-shirt here indoors........... I went outdoors this morning in a T-shirt for a run..........sure the locals looked at me and think I am crazy. Anyway, yes, I think a dehumidier is your best solution if you can find one and do not open the windows when it is below 15 degrees; always use the extractor fan when cooking and try to breathe less when sleeping , lol

9 years 36 weeks ago
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Scandinavian:

I would have thought so, never remembered being cold indoors. Used to sleep with windows open during winter (-10C) no problem, here when it gets close to 15C it starts to feel cold. the difference is the humidity, in Scandinavia it is dry air, here it is humid as hell, and everything stays humid all the time.

 

It's a good tip to not breathe at night, not sure I can live up to that though. Showering is not a problem, we have a fan than sucks so much that there isn't even a bit of steam on the glass surfaces in the bathroom. 

9 years 36 weeks ago
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9 years 37 weeks ago
 
Posts: 2735

Shifu

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Get an electric heater....they sell that in stores nowadays...

Scandinavian:

read OP, it says we have that already

9 years 36 weeks ago
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9 years 36 weeks ago
 
Posts: 9206

Emperor

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I had problems with walls and floors sweating in the spring. I guess the building was cold and it gets warm out. I moped the floors, which I did almost every day. the walls dried and I didn't have any black mold, so I never worried

 You could leave the windows open a crack and see if that evens out the humidity and glass sweating.

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9 years 36 weeks ago
 
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