Hello everyone,
I recently joined this forum because we are currently quite frustrated with the topic of ventilation.
Our construction project starts at the end of April.
It is a solid brick/Poroton house, a single-family home with 200 m² (2,150 sq ft) of living space on two levels. KfW 55 energy standard.
I can’t really explain it, but I can’t decide on a central ventilation system because of the long duct lengths inside the house. I know that all pipes are clean and protected by filters, but my gut feeling just doesn’t agree.
With decentralized systems, we are bothered by the fans on the exterior walls in every room.
Now we are looking for an alternative.
We also didn’t find window frame ventilators very appealing.
So my question is:
Has anyone else experienced this or does anyone know of another system?
We learned about a system available through Baufritz houses with air transfer grills. However, it is only distributed through Baufritz.
It’s a central ventilation system that blows air directly into the house over a short distance and then distributes it further via transfer grills above the doors.
I look forward to your input and help.
The undecided homeowner
I recently joined this forum because we are currently quite frustrated with the topic of ventilation.
Our construction project starts at the end of April.
It is a solid brick/Poroton house, a single-family home with 200 m² (2,150 sq ft) of living space on two levels. KfW 55 energy standard.
I can’t really explain it, but I can’t decide on a central ventilation system because of the long duct lengths inside the house. I know that all pipes are clean and protected by filters, but my gut feeling just doesn’t agree.
With decentralized systems, we are bothered by the fans on the exterior walls in every room.
Now we are looking for an alternative.
We also didn’t find window frame ventilators very appealing.
So my question is:
Has anyone else experienced this or does anyone know of another system?
We learned about a system available through Baufritz houses with air transfer grills. However, it is only distributed through Baufritz.
It’s a central ventilation system that blows air directly into the house over a short distance and then distributes it further via transfer grills above the doors.
I look forward to your input and help.
The undecided homeowner
U
Unentschlossen5 Apr 2021 07:42Thank you very much for the active discussion.
The KfW 55 loan only needs to be reviewed by the bank before construction begins. We have completed this, and the bank has documented it. Now, after construction has started, we have 3 months to submit the KfW application. Therefore, nothing is happening at the moment. But thank you for the note.
The KfW 55 loan only needs to be reviewed by the bank before construction begins. We have completed this, and the bank has documented it. Now, after construction has started, we have 3 months to submit the KfW application. Therefore, nothing is happening at the moment. But thank you for the note.
U
Unentschlossen5 Apr 2021 07:46The structural engineer would need to know if a mechanical ventilation system with heat recovery is installed in the concrete ceiling, as this affects the structural integrity. However, since we have very high ceiling heights and the ceilings will be suspended due to acoustic elements, electrical wiring, curtain rails, etc., the mechanical ventilation system could be integrated into the suspended ceilings. Nevertheless, we are still looking for an alternative solution to mechanical ventilation with heat recovery.
M
motorradsilke5 Apr 2021 07:50Unentschlossen schrieb:
Thank you very much for the lively discussion.
The KfW 55 loan only needs to be discussed with the bank before construction starts. We have done that, and it has been documented by the bank. Now, after construction has begun, we have three months to submit the KfW application. So nothing is happening yet. But thanks for the reminder. And how are you handling the financing? The KfW loan is part of the overall financing. You start building without having the full financing in place?
U
Unentschlossen5 Apr 2021 07:52I work at a bank myself. Financing is under control :-)
H
hampshire5 Apr 2021 08:15RotorMotor schrieb:
What are your facts and measurements? Humidity between 43 and 56%, with drops only during rapid and strong temperature increases caused by fully opening windows when outside temperatures are higher. Source: Froggit weather station indoor sensor – CO2 ppm measured sporadically with a loaned device, sleeping with windows closed, still under 200 ppm in the morning. Of course, this also depends greatly on room volume, since CO2 is not absorbed by materials like moisture is. In small rooms, sleeping is more comfortable with air exchange through open windows or other ventilation.
Our solution excluded KfW funding, requires some effort, and is largely independent of a utility provider.
Many roads lead to Rome.
@Unentschlossen has made a decision. Nice to hear you have progressed. Consider a solution with an enthalpy heat exchanger for effective humidity control.
U
Unentschlossen5 Apr 2021 08:20hampshire schrieb:
Humidity levels ranged between 43% and 56%, with drops only occurring during rapid temperature increases caused by fully opening windows when outside temperatures were higher. Source: Froggit weather station indoor sensor – CO2 ppm was only measured sporadically using a loaned device, sleeping with the window closed; still below 200 ppm in the morning. Of course, this is largely related to room volume, since CO2 is not absorbed by materials like humidity is. In smaller rooms, sleeping is more comfortable with air exchange through an open window or some other form of ventilation.
Our solution excluded KfW funding, requires some work, and is largely independent of any utility provider.
There are many ways to achieve the goal.
@Unentschlossen has made up their mind. Nice to hear you have made progress. Consider a solution with an enthalpy heat exchanger for better humidity control. Similar topics