Andii87
2023-03-05 12:25:12
- #1
Hello everyone,
we have bought a new condominium in a 5-unit kfw55 house (floor plan and ventilation concept attached). The house exceeds the requirements for airtightness, as confirmed by the blower door test.
So far, one ventilation unit (small room fan) has been installed in the bathroom (exhaust air to the outside) and one ventilation unit (central exhaust) in the interior guest WC (exhaust air into ventilation shaft):
- Bathroom ventilation: capacity 92 m3/h; controlled by light switch and additionally every 6 hours with a 20-minute overrun time
- Guest WC ventilation: capacity 30 m3/h full load, 15 m3/h partial load; controlled by light switch (full load) and additionally every 6 hours for 30 minutes partial load
Despite the ventilation systems, the humidity in the rooms is not ideal. Humidity measurements in the bathroom show that it repeatedly rises relatively strongly (due to normal use of the bathroom) and the ventilation cannot reduce it despite the above-mentioned operation.
Since we suspect that the ventilation performance may be limited by missing air supply, we have now also tested the ventilation with tilted windows in other rooms and found that the result is better.
The airtightness of the house may cause no natural air inflow when the ventilation units are switched on.
We are now considering in which rooms/windows window frame ventilators (which have not yet been installed) could help.
A particular challenge is that windows with increased sound insulation requirements have been installed in the bedrooms, and we want to maintain the achieved sound insulation if possible.
Who can provide us with information on how many window frame ventilators and in which rooms (see apartment floor plan and possibly ventilation concept) need to be installed to achieve at least optimal performance of the ventilation unit in the bathroom and a pleasant indoor climate in the other rooms?
Regarding the bedrooms: If, in your opinion, due to a possibly required minimum number of WFV, WFV are also necessary in the bedrooms:
Can you possibly recommend window frame ventilators that meet high sound insulation requirements? Do you have personal experience with them?
Thank you very much for your help!
we have bought a new condominium in a 5-unit kfw55 house (floor plan and ventilation concept attached). The house exceeds the requirements for airtightness, as confirmed by the blower door test.
So far, one ventilation unit (small room fan) has been installed in the bathroom (exhaust air to the outside) and one ventilation unit (central exhaust) in the interior guest WC (exhaust air into ventilation shaft):
- Bathroom ventilation: capacity 92 m3/h; controlled by light switch and additionally every 6 hours with a 20-minute overrun time
- Guest WC ventilation: capacity 30 m3/h full load, 15 m3/h partial load; controlled by light switch (full load) and additionally every 6 hours for 30 minutes partial load
Despite the ventilation systems, the humidity in the rooms is not ideal. Humidity measurements in the bathroom show that it repeatedly rises relatively strongly (due to normal use of the bathroom) and the ventilation cannot reduce it despite the above-mentioned operation.
Since we suspect that the ventilation performance may be limited by missing air supply, we have now also tested the ventilation with tilted windows in other rooms and found that the result is better.
The airtightness of the house may cause no natural air inflow when the ventilation units are switched on.
We are now considering in which rooms/windows window frame ventilators (which have not yet been installed) could help.
A particular challenge is that windows with increased sound insulation requirements have been installed in the bedrooms, and we want to maintain the achieved sound insulation if possible.
Who can provide us with information on how many window frame ventilators and in which rooms (see apartment floor plan and possibly ventilation concept) need to be installed to achieve at least optimal performance of the ventilation unit in the bathroom and a pleasant indoor climate in the other rooms?
Regarding the bedrooms: If, in your opinion, due to a possibly required minimum number of WFV, WFV are also necessary in the bedrooms:
Can you possibly recommend window frame ventilators that meet high sound insulation requirements? Do you have personal experience with them?
Thank you very much for your help!