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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[–] Givesomefucks@reddthat.com 4 points 1 year ago (1 children)

You can call an HVAC specialist and get something more permanent, but you need to do something ASAP.

But you can absolutely get one with a drainage tube and run it 24/7 tho. Lots of people in older houses in America do it.

[–] sylverstream 3 points 1 year ago (2 children)

Thanks. You mean a dehumidifier with a drain tube? I haven't seen one here in NZ.

[–] CosmicApe@kbin.social 2 points 1 year ago

Makita sell a handy tool that can fix that 🤣

[–] Seraph089@sh.itjust.works 1 points 1 year ago (1 children)

I can't speak to NZ, but even a normal tank dehumidifier should have the option for a drain line. It'll usually be a hose fitting hidden above/behind where the tank sits, so you can run a line to whatever household drain is nearby. And if it doesn't already have a fitting, it's usually pretty simple to add one.

It can make placement a hassle since you need to be near a drain, but you'll barely need to touch it beyond setup. It's a huge upgrade from dumping the tank constantly.

[–] sylverstream 1 points 1 year ago

Yes, just bought one, and it has a drain outlet. Never knew that. Thanks!