Hello,
Some time ago, we moved into a KFW40 energy-efficient house. The landlord did a lot of the work himself and was not finished with everything at the time we moved in. About four weeks ago, the ventilation system was installed and activated. Since that day, we have experienced significant noise disturbance.
The system operates in two stages, increasing speed depending on the humidity level. At the first stage, the noise is mainly loud in the bathrooms and kitchen. For example: having dinner with conversation in the kitchen is very tiring. When I stand in the hallway on the lower floor, I can hear the ventilation from the bathroom upstairs.
When the system switches to the higher stage, the noise is clearly audible in all rooms. At that point, sleeping is not possible. I measured nearly 50 dB in the center of the kitchen using my phone.
Our landlord claims this noise is completely normal and that we find it disturbing because the triple-glazed windows insulate the house so well.
It seems the noise mainly comes from the fittings inserted into the holes in the wall. When I remove them and look into the open holes, almost no noise can be heard even at the highest stage. The fittings are made of stainless steel and honestly appear to be high quality, not cheap.
My question is whether we (and our neighbors below) are simply too sensitive, or whether he has somehow done a poor job here. From my understanding, it can’t be right to build a house that is pleasantly quiet and then ruin that with such a system. Unfortunately, I don’t know anyone with a house that has this kind of system, so I cannot compare.
Thank you very much for your expert opinion!
Best regards
Some time ago, we moved into a KFW40 energy-efficient house. The landlord did a lot of the work himself and was not finished with everything at the time we moved in. About four weeks ago, the ventilation system was installed and activated. Since that day, we have experienced significant noise disturbance.
The system operates in two stages, increasing speed depending on the humidity level. At the first stage, the noise is mainly loud in the bathrooms and kitchen. For example: having dinner with conversation in the kitchen is very tiring. When I stand in the hallway on the lower floor, I can hear the ventilation from the bathroom upstairs.
When the system switches to the higher stage, the noise is clearly audible in all rooms. At that point, sleeping is not possible. I measured nearly 50 dB in the center of the kitchen using my phone.
Our landlord claims this noise is completely normal and that we find it disturbing because the triple-glazed windows insulate the house so well.
It seems the noise mainly comes from the fittings inserted into the holes in the wall. When I remove them and look into the open holes, almost no noise can be heard even at the highest stage. The fittings are made of stainless steel and honestly appear to be high quality, not cheap.
My question is whether we (and our neighbors below) are simply too sensitive, or whether he has somehow done a poor job here. From my understanding, it can’t be right to build a house that is pleasantly quiet and then ruin that with such a system. Unfortunately, I don’t know anyone with a house that has this kind of system, so I cannot compare.
Thank you very much for your expert opinion!
Best regards
G
glimmer081518 Jul 2023 14:04No, those are turntables that can be rotated further inward or outward.
KoalasAreCute18 Jul 2023 14:59Maybe a picture of it would be helpful? It certainly can’t hurt.
Since it is a central ventilation system, I’m interested in knowing what the airflow rate is, and whether any calculations have been made regarding how much it should be per room. During the internal commissioning, they inserted foam rounds into the duct to ensure it was correct. In our case, we can barely hear anything, except when standing in the utility room next to the unit. However, that was a combined air-to-water heat pump and ventilation system.
The installer also mentioned that it could become noisy if the ventilation filters are not cleaned, but I can’t imagine that happening within just one month of operation.
Since it is a central ventilation system, I’m interested in knowing what the airflow rate is, and whether any calculations have been made regarding how much it should be per room. During the internal commissioning, they inserted foam rounds into the duct to ensure it was correct. In our case, we can barely hear anything, except when standing in the utility room next to the unit. However, that was a combined air-to-water heat pump and ventilation system.
The installer also mentioned that it could become noisy if the ventilation filters are not cleaned, but I can’t imagine that happening within just one month of operation.
G
glimmer081518 Jul 2023 15:29There was no commissioning, no technician, no expert, no calculation, no one with any knowledge. Our landlord just screwed the thing to the wall and pressed the start button. Yes, unfortunately ... :-(
H
HeimatBauer18 Jul 2023 18:06Where is the unit located? I have a central ventilation system and I can hear absolutely nothing from it.
So:
- Is the ventilation unit installed in the basement/utility room with a soundproof door?
- Is there a silencer installed after the ventilation unit?
- Are the ventilation ducts embedded in the screed?
- What do the supply/exhaust air outlets look like?
- What ventilation settings are available and which one is it operated on?
So:
- Is the ventilation unit installed in the basement/utility room with a soundproof door?
- Is there a silencer installed after the ventilation unit?
- Are the ventilation ducts embedded in the screed?
- What do the supply/exhaust air outlets look like?
- What ventilation settings are available and which one is it operated on?
K
KarstenausNRW18 Jul 2023 19:38ypg schrieb:
You can rotate the plates in the openings, right?!
If you close them, it should be quieter… Actually, it’s the other way around. If the same amount of air has to pass through a smaller opening, it will get louder. At some point, it might even start whistling like with drafty front doors and windows.
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