ᐅ Quiet decentralized ventilation system for new single-family home construction

Hello everyone,

During our first consultation with a building professional for a quote, we were asked to choose a ventilation system ourselves, as we are still somewhat skeptical about the "SEVi 160" model proposed by them. Our planner recommended a Halmburger ventilation system – we definitely want to see and listen to it in person. He also mentioned BluMartin, which personally seems a bit bulky to me – and once additional rooms are connected, it starts to feel more like a “central” system again. I also find the cassette filters quite expensive at 50 € (about $55) per unit per year.

We found the videos on the Bayernlüfter website quite appealing, but we are somewhat skeptical about the maximum airflow of 20 m³ (about 710 cubic feet) per hour. We also couldn’t find any information about noise levels at different ventilation rates (which is also missing for the SEVi – but the building professional mentioned that it can be heard).

We are looking for a ventilation system that can achieve an air exchange rate of 40 m³ (about 1,400 cubic feet) per hour (approximately 1 air change per hour for our bedroom) without being audible. Does such a system exist, or does anyone have experience with the mentioned brands? Is an air exchange rate of 1 per hour even necessary for a bedroom with two occupants?

Thank you and best regards.

P.S.: I have the impression that the decentralized ventilation industry is very fragmented with many small players.

Hi,

I’m currently researching this as well.

We have a timber-framed house and want to install a decentralized ventilation system.

I’ve seen the Bayernlüfter, but I can’t quite picture how it works.

What other affordable options are there? Without just shifting the costs to higher electricity bills.
(Many measures seem like cost-shifting to me, but I could be wrong.)

I’d appreciate any tips and information.

Regards,
MaHaus

There is a video on their website where a developer presents the product in a very charming and honest way.
We will now choose the SeVi, as the builder offers and installs it, and they look at least quite decent.
The noise level didn’t impress me, but it wasn’t that bad either. We also spoke with some people who said they always keep it at level 2 and that you get used to it.
The build protection is apparently guaranteed at level 1.

There is also a company from Berlin that is said to operate relatively quietly.
We have decided to go with them, but have not installed it yet.

BeHaElJa schrieb:
Hello everyone,

The first general contractor we contacted for a quote asked us to choose a ventilation system ourselves, since we are still a bit unsure about the "SEVi 160" model they suggested.

We are looking for a ventilation system that provides an air exchange rate of 40 m³ (about 1/h for our bedroom) without being audible. Does such a system exist, or does anyone have experience with the mentioned units? Is an air exchange rate of 1/h really necessary for a bedroom (2 persons)?

BeHaElJa schrieb:

We have decided to go with the SeVi since the general contractor offers and installs it, and it at least looks acceptable.
The noise level didn’t exactly impress me, but it also wasn’t bad. We also spoke with others who said they always run it on setting 2 and get used to it.
Apparently, the building protection function is guaranteed even at level 1.

We have an SEVi 200. Before we chose it, we visited a ventilation consultant near Berlin where we could listen to five different units installed and running. One of the units was from a large Berlin manufacturer. As mentioned – after the “listening test” with comparable performance and a very informative consultation, we decided on this model.
IMPORTANT: When installing, make sure everything is done exactly according to the instructions. Two key points must be observed carefully. More details available on request via private message.

Noise level: Yes, you can hear it. That’s completely normal. During the day – with normal use – at 50% (setting 2) you can’t hear it at all, even at setting 3. We hardly ever used setting 4.
At night – when it’s quiet – the system can be heard. Setting 2 is completely fine. Some people had issues with setting 3 (my wife initially found it disturbing, but no longer does). Setting 4 (100%) is definitely audible.
There is an interesting feature in the control unit – a sort of Easter egg (especially topical around Easter). With a certain key combination (not listed in the manual), you can activate a timer function. This means the system will turn off for one hour and then switch on automatically again.
One more thing – in case of strong wind, it might be advisable to turn the system off.

Oh, so there isn’t really any noise protection either.
So you have to either accept that or find another solution, if there is one.

In my own home, I definitely want peace and quiet, that’s why I’m doing this!!!

Best regards
MaHaus