Ventilation system - Noise level dependent on which factors?

In any case, I will question the house builder in the next conversation about how their planning generally works, then I will continue writing here and maybe (at least for me, because it’s my thread) it will eventually become something meaningful that ties it all together

What you can definitely do is at least mention that it was due to a low volume and consider for yourself which standard temperatures you want in which rooms.

Combining both reads like a good plan. You should say at the beginning what is important to you about the house and make sure that this is also noted.

@ypg is, by the way, a she.

That’s right :)

because you only find out afterwards how loud your devices are, keep distance between the bedroom and children's room and the utility room. Our utility room is between the bathroom and guest toilet, no one sleeps wall to wall with the devices. This has proven effective

Thank you very much for the great post! I'll do that, mention the volume (I had actually already mentioned it once) and state the desired temperatures (I wasn’t aware that I had to say that in advance :oops:), in winter we usually have 23-24° in our living rooms (except in the bedroom). I'm curious whether it will still work out with the air-water heat pump!? I'll just say "24° please, summer and winter" :).

Did you also build with a prefab house manufacturer? How were you able to name a "preferred" heating engineer there?


Sorry, that wasn’t meant badly and certainly not offensive :). I see all genders and races on a podium, dumb people come in every kind!


Fortunately, that’s not a problem, our utility room is in the basement and we sleep on the upper floor, so fortunately there is a whole floor in between :).

often overlooked:

the "noise" mainly comes from structure-borne sound.
that means the vibrations of the fans are mechanically transmitted to the ventilation duct system.

it is better/quieter if the fan unit is decoupled from the pipes,
meaning it is not rigidly connected to them.

here the central fan unit stands on the floor with rubber feet. the connection to the [LuftschachtAnschluss] is then made via flexible [Aluflexrohre].

this way, in the living area you only hear a slight air noise at max speed,
you don't hear the motors at all.

I see all genders and races on a podium, there are dumb people of every kind!

You’ve got me there ;) I don’t take it personally... on the phone you don’t see some things that are obvious on the PC. Besides, you’re new :)

I didn’t realize that I had to say that in advance :oops:), we actually always have 23-24° in our living spaces in winter (except in the bedroom). I’m curious whether that will still work with the air-water heat pump!? I'll just say "24° please, summer and winter" :).

You don’t have to, but then the heating will be designed for 20°, which is likely too cool for most people in the living room. That doesn’t mean more isn’t possible, but it then has to be achieved in the design with increased flow temperature, which costs efficiency. If you state a higher desired temperature from the outset, it increases the heating load for the room, and a "good" heating engineer will initially try to compensate by closer spacing of the underfloor heating pipes. A desired temperature of 24° is already quite a lot and will possibly still result in a higher flow temperature, but it depends on many factors. No, I didn’t have a prefab house builder, but a regional planner with fixed subcontractors (general contractor). Taking out the trades of heating, sanitation, and ventilation was not my wish but a necessity, since, as mentioned, the standard subcontractor of the GC no longer wanted to do it and the GC couldn’t provide an in-house replacement. I wouldn’t recommend deliberately aiming for self-award if you don’t have good expertise and basically already have corresponding companies at hand. I can’t really imagine a prefab house builder doing that at all. Have you already signed?