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Dehumidifier to prevent mould

 
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jazzmaster



Joined: 30 Sep 2013

PostPosted: Sun Dec 08, 2013 5:39 am    Post subject: Dehumidifier to prevent mould Reply with quote

My girlfriend has moved into a new apartment. It's her first apartment and she's very happy. I was staying over and noticed a lot of moisture on her window in the morning. I also saw a little black patch on the wall that came off when she wiped it. I reckon the apartment might suffer damp due to poor insulation (it's an old building).
First I'd like to check that there is too much moisture in the air, then (if necessary) I'd like to buy a dehumidifier.
Does anyone know if there are kits to test how much moisture is in the air? If so, where can I buy them and how much do they cost?
If anyone can give any decent advice (outwith the "tell her to move apartment" or "i thought you'd be happy your girlfriend is wet") I'd appreciate it.
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littlelisa



Joined: 12 Jun 2007
Location: Seoul

PostPosted: Sun Dec 08, 2013 5:52 am    Post subject: Reply with quote

I had similar problems, which annoyed me as I am in a very new building. I bought a dehumidifier and it has fixed problems for now. The landlord said I should be ventilating more, but screw that, it's winter, and if I need to open my windows for there to not be mold, that's the building's bad construction. I'd rather get a dehumidifier than crack my windows in the winter, and besides, what's his solution in the summer? I'm not sure what to do when I get to vacation and I am not here to run the dehumidifier, but I guess I'll cross that bridge when I come to it.
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Lazio



Joined: 15 Dec 2010

PostPosted: Sun Dec 08, 2013 6:18 am    Post subject: Re: Dehumidifier to prevent mould Reply with quote

jazzmaster wrote:
My girlfriend has moved into a new apartment. It's her first apartment and she's very happy. I was staying over and noticed a lot of moisture on her window in the morning. I also saw a little black patch on the wall that came off when she wiped it. I reckon the apartment might suffer damp due to poor insulation (it's an old building).
First I'd like to check that there is too much moisture in the air, then (if necessary) I'd like to buy a dehumidifier.
Does anyone know if there are kits to test how much moisture is in the air? If so, where can I buy them and how much do they cost?
If anyone can give any decent advice (outwith the "tell her to move apartment" or "i thought you'd be happy your girlfriend is wet") I'd appreciate it.


Yepp, condensation on the windows (that’s where you see it first but the same thing happens through the walls as well) means the humidity is too high in the apartment.
Getting a dehumidifier will help. Alternatively you can make sure to get fresh air several times a day, especially when cooking. Avoid drying clothes inside if possible. If there is no other way crack the window open a tiny bit when you do laundry.
It will only get worse when the real cold weather comes with bone dry air.

Summer is an entirely different issue. Condensation occurs when it’s cold outside with low humidity but inside is warm and the humidity is higher.

We use one of these things. I’m sure it’s not perfectly accurate but good enough for this purpose.
http://item2.gmarket.co.kr/English/detailview/item.aspx?goodscode=350072233


Last edited by Lazio on Sun Dec 08, 2013 7:10 am; edited 1 time in total
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optik404



Joined: 24 Jun 2008

PostPosted: Sun Dec 08, 2013 6:56 am    Post subject: Reply with quote

Bubble wrap on the windows will help with the condensation and also keep it a bit warmer.
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YTMND



Joined: 16 Jan 2012
Location: You're the man now dog!!

PostPosted: Sun Dec 08, 2013 8:11 am    Post subject: Reply with quote

You are trying to prevent Bob Mould from entering your apartment?
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oatmeal



Joined: 26 Nov 2013

PostPosted: Sun Dec 08, 2013 8:00 pm    Post subject: Reply with quote

*****VERY IMPORTANT*******

I want to alert anyone who might be buying a dehumidifier. Dehumidifiers only work in optimal temperatures, no lower than usually 65 F (or around 14-16 C). If the temperature indoors is any lower than that, the dehumidifier will freeze up (frost will build up on the coils).

I had the same dilemma. I would leave my window open slightly but now that it's winter, the air is cold and it's making my room cold. So I thought that I could just open the window AND use a dehumidifier. But that doesn't work. The dehumidifier frosts up. So you can only use it IF you have our ondol heater turned on to warm up the air unless your building is nicely ventilated and indoor temp. is always above 14 degrees naturally on its own.

During the warmer season, you don't have to worry about this. Dehumidfy liberally. But in the winter, the air is too cold it'll cancel the effects. I found that I have to use my ondol heating not to warm me up, but simply for the sake of my clothes to keep them from growing mold or clothes not drying.

I keep a digital humidity/temp reader and these days my indoor humidity is always at 70-90% unless i turn on the heating and then it goes down to 60%.
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jazzmaster



Joined: 30 Sep 2013

PostPosted: Mon Dec 09, 2013 10:26 pm    Post subject: Reply with quote

Thanks for the advice, folks.
I think I'll buy something similar to what Lazio recommended. I'll also stick bubble wrap on the window. If the humidity is still too high I'll buy a dehumidifier and keep an eye out for any frost on the coils.
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wings



Joined: 09 Nov 2006

PostPosted: Tue Dec 10, 2013 5:21 pm    Post subject: Reply with quote

How much does a dehumidifier cost? Any rough estimates?
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spaceman82



Joined: 01 Dec 2009

PostPosted: Tue Dec 10, 2013 8:34 pm    Post subject: Reply with quote

Anywhere from 60,000 (or maybe less?) to a few hundred thousand won for one with a bunch of bells and whistles.
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El Bandito



Joined: 07 Oct 2013

PostPosted: Tue Dec 10, 2013 9:51 pm    Post subject: Reply with quote

You have something against Sugar?
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Weigookin74



Joined: 26 Oct 2009

PostPosted: Wed Dec 11, 2013 4:43 pm    Post subject: Reply with quote

littlelisa wrote:
I had similar problems, which annoyed me as I am in a very new building. I bought a dehumidifier and it has fixed problems for now. The landlord said I should be ventilating more, but screw that, it's winter, and if I need to open my windows for there to not be mold, that's the building's bad construction. I'd rather get a dehumidifier than crack my windows in the winter, and besides, what's his solution in the summer? I'm not sure what to do when I get to vacation and I am not here to run the dehumidifier, but I guess I'll cross that bridge when I come to it.


No you shouldn't be ventilating more. He should have built it better with insulation and installed double windows properly. Add that to using the heat somewhat, you should have no mold. Korea gets a lot of dampness and moisture in it's air year round and an old building with no insulation and thin windows accumulates it badly. This builds up and becomes mold on the wallpaper not because of venting but because of piss poor quality construction.

In summer scream at him until he pays the cost of removing the mold. He'll try to be stubborn and blame you, but don't give in. Be a real pain in the you know what?
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optik404



Joined: 24 Jun 2008

PostPosted: Wed Dec 11, 2013 4:54 pm    Post subject: Reply with quote

Install a trickle vent if you can. It will help immensely.
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