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
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
@ypg
Thank you 🙂
@Tolentino
I’ve seen the installation spacing mentioned in some YouTube video before. It seems like a good way to improve the heating system fairly cost-effectively. I wanted to ask about it at the next appointment because I’ve also read that some homebuilders offer it as an optional feature. It’s nice to see it mentioned here as well.
We haven’t signed anything yet; there are about 3 or 4 options still in close consideration. However, from the beginning, we had the best feeling with one particular builder and it’s almost certain (unless he suddenly brings a dog) that we’ll choose to build with him. There’s another on-site appointment at the factory on Friday, and I expect that after that, we’ll have to make a decision. That said, we’re not under any pressure and are not being pressured.
Thank you 🙂
@Tolentino
I’ve seen the installation spacing mentioned in some YouTube video before. It seems like a good way to improve the heating system fairly cost-effectively. I wanted to ask about it at the next appointment because I’ve also read that some homebuilders offer it as an optional feature. It’s nice to see it mentioned here as well.
We haven’t signed anything yet; there are about 3 or 4 options still in close consideration. However, from the beginning, we had the best feeling with one particular builder and it’s almost certain (unless he suddenly brings a dog) that we’ll choose to build with him. There’s another on-site appointment at the factory on Friday, and I expect that after that, we’ll have to make a decision. That said, we’re not under any pressure and are not being pressured.
Dany250 schrieb:
I’ll just say “24°C (75°F) all year round, please.” Wow. Then I guess KfW40 standards will definitely be necessary.
Tolentino schrieb:
If you specify a higher desired temperature from the start, this increases the heating load for the room, and a “good” heating engineer will initially try to compensate for this by reducing the spacing of the underfloor heating pipes. Indeed, such a cozy temperature is definitely relevant when defining the building performance specifications.
Tolentino schrieb:
I wouldn’t recommend deliberately taking on self-contracting (directly managing subcontractors) unless you have solid expertise and essentially already have the right companies lined up. I honestly can’t imagine a prefab home builder doing that at all. I wouldn’t recommend it either. It usually backfires when you disrupt general contractor workflows.
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H
hampshire19 Oct 2021 14:44My concern is that these systems will become louder as they age, just like any refrigerator.
11ant schrieb:
However, such a cozy temperature is definitely relevant to the building specification.What is a building specification?@hampshire
As long as it can be replaced...
My concern—which is why I started this thread—is that, for cost reasons, some elements might be cut, and such mistakes might then be impossible to fix or only fixable with increased effort. I’d rather ask about an option that might cost me a few extra dollars upfront but would let me sleep more peacefully (literally 😉).
Dany250 schrieb:
What is a building specification?That is the necessary building specification.H
hampshire19 Oct 2021 15:01Dany250 schrieb:
As long as it’s replaceable...
My concern, which is why I started this thread, was that cost-cutting might lead to compromises, resulting in errors that can no longer be fixed—or only with great effort and expense. I’d rather ask about an option that might cost me a few extra dollars upfront but lets me sleep more peacefully (in the literal sense of the word 😉). Since our heating system works differently, I can’t give you specific advice except this: don’t skimp on the quality of the installer company if you’re managing the contract yourself. Choose one who loves their work and treats their team well. Accept a higher hourly rate for that—it’s no guarantee, but it greatly increases the chances of an excellent installation.