this post was submitted on 21 Jun 2023
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We've got an insulated house, heat it properly, ventilate it, but still see humidity levels of 70%+ in bed rooms. How to fix that? (self.newzealand)
submitted 1 year ago by sylverstream to c/newzealand
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We built a house 7 years ago and it's insulated and has double glazing. I've installed Home Assistant with temp sensors in the bed rooms and seeing 70%+ humidity levels. Temperature is always above 16c

We ventilate it, but still it's 70% in the bedrooms. WHO recommends 40-60%, so we're a bit worried.

Living room is around 55% during the day when we have the heat pump set at 21c.

As it's pretty humid outside I think it's almost impossible to get it lower, but are there any other tips? I don't want to run dehumidifiers. Would an HRV like system help?

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[–] sylverstream 2 points 1 year ago

Thanks for the details!

Smooth air has kits for just ventilation for 1.5k for 2 rooms. Smartvent is more expensive, like 4k, they have some pricing.

I don't need a lot of bells and whistles. I can automate it myself. Just an outdoor outlet and an indoor outlet, ventilator and two pipes for just the living room.

I read your article, they say HRV/DVS is bad for heating, but not if you use it just for ventilation?

One other easier option is to just have a simple diy DVS by using the air from the attic. I'm going to check the moisture levels there first.