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
glimmer081519 Jul 2023 07:53Where would these filters need to be replaced? There are definitely no filters on the valves. Are they located inside the system itself?
So, all my valves have filters. Of course, there are also central filters in the system itself, which need to be replaced as well. Ours needed replacing fairly quickly the first time because dust naturally accumulates during the construction phase.
Please take some photos of the valves, also opened. Inside the valve insert, there is a clamping point where the filter is installed (or should be installed?).
The system would get completely clogged if the filter were missing at the extraction points.
Please take some photos of the valves, also opened. Inside the valve insert, there is a clamping point where the filter is installed (or should be installed?).
The system would get completely clogged if the filter were missing at the extraction points.
H
HeimatBauer19 Jul 2023 08:20I am only familiar with filters at the extraction points, not at the supply air vents. And, of course, the filters inside the system itself. These can be removed, inspected, and cleaned if necessary—regular replacement is required anyway. The same applies to the extraction points.
Noise can come from turbulence in the supply air vents or from the ductwork connected to the system. A silencer (sound attenuator) is installed between the ventilation unit and the duct, which should be visible. In my case, there are four boxes measuring 20 x 50 x 150 cm (8 x 20 x 59 inches), so they are hard to miss.
Noise can come from turbulence in the supply air vents or from the ductwork connected to the system. A silencer (sound attenuator) is installed between the ventilation unit and the duct, which should be visible. In my case, there are four boxes measuring 20 x 50 x 150 cm (8 x 20 x 59 inches), so they are hard to miss.
C
chand198619 Jul 2023 08:38glimmer0815 schrieb:
There are definitely no filters on the valves.But there should be some on the intakes. That can also affect the noise, completely different flow behavior.