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286 posts

Ultimate Geek


  #2515158 30-Jun-2020 15:35
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AklBen:

 

"Serious question: have you tried opening the windows? When it's cold outside the humidity is low, so if there's no rain actively coming in the windows opening them reduces your humidity."

 

Yes, I am a big fan of opening the windows but we aren't home between 730am and 6pm during the week, and as it has been raining a lot you cannot always have windows open let alone leaving a window open which is visible from the street. Depending on the weather, unfortunately over the last two weeks I'd say the windows have only been opened a few times on the weekend.

 

 

Depending on your situation, the outside air on a rainy day could be drier...

 

 

 

Take for example your humid house, 21c at 80% RH. That equals 15 grams/m3 of water.

 

Outside raining might be 12c at 80% RH = 9 grams/m3 of water.

 

If you let that colder air in, let it warm up it contains the same absolute moisture but at 21c it is now 50% RH.

 

Have a play with this calculator yourself https://planetcalc.com/2167/ Make sure you set the pressure to something realistic such as 1010 hPa.


1049 posts

Uber Geek


  #2515201 30-Jun-2020 18:31
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It may not be the way you want to go but when I first arrived in auckland 20 years ago I was living on the Shore and moild and dampness drove us crazy. We then looked at an HRV system (not the firm of that name which sels a completly different device)

 

We subscribe to COnsumer and they recommended Clenaire https://cleanaire.co.nz/

 

Basically  it has a vent at front end of house and another at the rear end. In the middle sits the HRV. It pulls air in from the front the exchanger has fans etc and every room has either an inlet and exit or just an inlet. Warm air is taken from the house and feed to heat exchanger where it warms the air coming in from outside. The fresh warmed air is then exited into each room of house. That warm moisture ladden air is then expelled outside. The system rund all day and night all year round. It solved all our problems. You do have to iunderstand that it works by using the warm aior to heat the coldair from outside. If you had no heating inside house its not going to works as well. Cleanaire come and design a system for your style of house.





Nokia 7 Plus
Nexus 6P 32Gb
Nexus 6 Phone
Nexus 5 Phone
Nexus 7 2013 Tablet
Samsung TAB A 8"
Samsung TAB A 10"

 

& many Windows laptops, Desktops etc

 

 

 


 
 
 
 


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1323 posts

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  #2515262 30-Jun-2020 19:06
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We have a cold house in the bush and run two dehumidifiers essentially 24/7.
One in the downstairs bathroom that keeps the room warm and dries the towels (heated towel rail also) and helps the whole downstairs somewhat.
Other one upstairs, overnight in the lounge, so as not directly above my bed for noise, then in the morning I move to other end of house for the kids bedrooms.

Cheers,
Joseph

268 posts

Ultimate Geek


  #2516683 3-Jul-2020 11:09
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I am currently trialing my enuite bathroom extractor fan to automatically turn on when RH is 80% and above.

 

It will run for 15mins and turns off. Then do another check every 30mins.

 

 

I usually noticed it turning on automatically around 2 to 3am when the temperature drops.

 

 

We have a portable dehumidifier that we haven't been using for years now.

 

RH throughout the house stays around 60% based on sensors installed in each room and common areas.

 

 




22 posts

Geek


  #2516688 3-Jul-2020 11:18
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russelo: I am currently trialing my enuite bathroom extractor fan to automatically turn on when RH is 80% and above. It will run for 15mins and turns off. Then do another check every 30mins. I usually noticed it turning on automatically around 2 to 3am when the temperature drops. We have a portable dehumidifier that we haven't been using for years now. RH throughout the house stays around 60% based on sensors installed in each room and common areas.

 

Looks like we might be only running dehumidifiers on wet weeks, bought the dehumidifier on Tuesday, ran it for a few days and with this nice weather the humidity in the house has been sitting between 50-65% in our sensors scattered around the house...

 

Certainly made a difference on those first two days though!


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