ᐅ Ventilation System – What Factors Affect Noise Levels?

Created on: 15 Oct 2021 16:37
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Dany250
We are planning our 40+ single-family house with a ground source heat pump and a ventilation system with heat recovery.

Some time ago, we visited a show home from a company that starts with "Finger" and ends with "Haus" (I'm not sure if the name can be mentioned). This show home also had a ground source heat pump with a ventilation system equipped. The air ducts for it were located on the floor, both on the ground floor and the upper floor. We already noticed the relatively loud noise from the ventilation downstairs, but when we were upstairs in a closed meeting room, it was really disturbingly loud.

I can’t quite describe it properly; it sounded like metal blowing air. Really hard to explain, but it was definitely noticeable and unpleasant.

On another occasion, we visited a show home by a company with "Streif Haus" in the name, but no extra suffix at the end. Here, however, there was a ground source heat pump with integrated ventilation. We absolutely couldn’t hear anything, not even with the door closed and my head (almost) right at the air outlet on the wall.

Actually, we have never heard the air in any of the houses; it was only noticeable in the first house mentioned.

Since we are considering the same system principle, albeit with different brands, I’m now a bit worried that it might be the same with us, and then this system would be turned off 100%, permanently! That’s simply not an option, not only when sleeping but in general.

Are there general things to consider in advance to reduce the "noise"?

Is the brand decisive?

Are the ducts included with the brand of the ventilation system, or do they generally come from somewhere else, so that one can be lucky or unlucky depending on what the builder installs?

I would appreciate your answers…

Best regards Dany250
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Dany250
19 Oct 2021 19:28
11ant schrieb:

And yet you don’t want to show the forum any approaches for qualified help, just because the favorite hasn’t shared the floor plans yet? – especially with pie-shaped or alpine lots, having many contributors really helps!

The plot isn’t going anywhere, and the questions about it won’t decrease either 😉. At the beginning, the priority was to observe how the future homeowners handle the plot and how they assess the location. Those who showed no interest here and dismissed it as the usual, those who dramatically underestimated the additional construction costs, or those who simply dismissed us have been dropped.

You will still get the chance to advise me about the plot, probably more than you would like. I have to manage my time carefully until signing, so the plot will take a back seat for now until the more important questions are asked and answered.

The question of whether it makes sense to also direct my questions on this topic to the other contributors doesn’t really arise. That’s why I am here and need your help on this topic again…
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Dany250
19 Oct 2021 19:36
KingJulien schrieb:

Of course it works with an air pump, why not?
But for 24°C (75°F) all year round, you’ll also need air conditioning.
This becomes increasingly clear the longer I follow discussions in this forum, meaning I realize more and more that I won’t be able to avoid it. Ideally, I would like to have a provision planned in, but due to KfW40 standards, almost all homeowners agree that they are not allowed to do that. So, for now, I have to make do and hope that ground cooling, the ventilation system, insulation, and shading will be sufficient—at least until I’m awake at night again, sweating and uncomfortable.
Nida35a19 Oct 2021 19:50
Dany250 schrieb:

Fortunately, this is not a problem. Our utility room is located in the basement, and we sleep on the upper floor, so thankfully there is a whole floor in between.
In summer, the upper floor is the warmest, around 25–30°C (77–86°F). Without air conditioning, you end up sleeping in the basement near the utility room, so avoid planning the bed against the wall adjoining the utility room.
KingJulien19 Oct 2021 20:24
Nida35a schrieb:

without air conditioning, you sleep in the basement

Here’s a completely new argument in the with/without basement debate: The basement as a summer retreat 😉
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Dany250
19 Oct 2021 22:24
Nida35a schrieb:

In summer, the top floor is the warmest, around 25-30°C (77-86°F). Without air conditioning, you’ll have to sleep in the basement near the utility room, so don’t plan to put the bed against the wall shared with the utility room.
I will take your advice to heart 🙂
11ant19 Oct 2021 23:35
Dany250 schrieb:

You will still get the chance to advise me about the plot, probably more than you’d like. I have to manage my time carefully until the contract is signed, so the plot takes a back seat until the more important questions are asked and answered.
The question of whether it makes sense to also involve the thinking parties in these questions doesn’t really arise.

But you don’t do it (in time). Do you seriously want to be told ONLY AFTER signing the contract, for example, that the house design doesn’t fit the terrain well, that a different one would be wiser to choose, or that the house needs to be rotated (and then re-planned so that the heat recovery ventilation connects properly to the house inlets)?
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