ᐅ Ventilation and Exhaust with Moisture Recovery?

stefanc84 schrieb:
Alternatively, plants or an aquarium can help – although I wouldn’t get the latter just for humidifying the air ;-)

I have about 10 plants in my living room, which has a volume of roughly 160m³ (5,650 ft³). Half of them are in larger pots with plenty of foliage. I water them once a week with liters (not milliliters).
The humidity never rises above 30% at 19-20°C (66-68°F).
The room also has an open roof structure and oiled hardwood flooring. I can’t imagine the wood absorbing that much moisture that I can’t get above 30%. Even if it did, at some point it would become saturated.
I ventilate manually by opening and closing the windows once a day.

I once tried using a humidifier and managed to reach 40%. If I wanted to reach even higher levels or maintain that constantly, I would probably have to humidify the entire apartment. Otherwise, the moisture just “evaporates” into the rest of the flat.

Hmm, that sounds really dry. I would almost have to disagree with Lumpi on this. If it’s that dry because of a controlled mechanical ventilation system, okay, then you could try a system with humidity recovery. But if you don’t have any ventilation at all… Apparently, there is no moisture in the air to recover.
In our timber frame shell construction, we currently have only about 30% humidity. No one is living there yet, so I hope it improves. The weather is also very dry right now, of course.

Oh, I thought this was about a hypothetical problem.
If you ventilate manually once a day and the house is still dry, then something else must be wrong.
In our current apartment, we also ventilate manually once in the morning and have 45-50% humidity, which is how it should be.

To be honest, I don’t see this as a major issue. I don’t think there’s anything really wrong. After all, where else would the moisture come from?

Right now, the outdoor humidity is no more than 40% RH, so ventilating only increases it slightly. Also, I live alone, so body moisture alone is never enough to make a significant difference.

After extended cooking, the humidity improves somewhat, but only for a few hours.

I think the benefits of plants are overrated—they might have some effect, but not really much.

I suspect the cause is simply that the room is very large, has significantly more wood than typical apartments, and uses regular radiators instead of underfloor heating.

The only thing that might help me is to ventilate less, or only when it’s raining. But it doesn’t really matter; a slightly low humidity level isn’t that bad.

blaupuma schrieb:
For heaven’s sake

Don’t like it? No problem at all.
You can complement your existing controlled residential ventilation system with a humidifier.
Search for "AeroFresh Plus"
Great device! It costs about ten times more, but it looks nicer.

All those suggestions like plants, aquariums, showering, cooking come from well-read theorists who don’t have much practical experience.

Lumpi_LE schrieb:
Or an indoor swimming pool if we’re talking about silly ideas.

Sorry. You need to be patient for another six months.
The school enrollment is in the fall.

@blaupuma:
Do you even have a ventilation system?
If you do, just having humidity recovery alone is not enough. It only recovers moisture from the air that is already present, and from that, only about 70% (as far as I know). However, if you actively add humidity, you can save some energy with the recovery system, because the humidifier won’t have to work as much as without it.