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? (lemmy.nz)

submitted 1 year ago by sylverstream@lemmy.nz to c/newzealand@lemmy.nz

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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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[-] shutuuplegs@reddthat.com 2 points 1 year ago

Hvac is oversized and not running long enough. Super common issue especially when people tighten up their house

[-] TagMeInSkipIGotThis@lemmy.nz 1 points 1 year ago

What sensors are you using to measure your humidity? Have you got anything you can calibrate against?

[-] sylverstream@lemmy.nz 1 points 1 year ago

I've got Sonoff SNZB-02 temp sensors. I also have a weather station; there is a difference of up to 5%, so I am taking the readings with a grain of salt.

I just bought a dehumidifier which has a RH sensor as well, which is almost the same as the reading of my Sonoff sensors.

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