ᐅ Cancel planned decentralized ventilation system?

Created on: 8 Nov 2019 12:18
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Sternchen31
Hello,

I will link the main topic of our purchase of a semi-detached shell construction later tonight so that the construction description and the submitted plans can also be viewed.

But for the current question, this is probably a better place.

Facts:
We are buying an already existing shell construction from the developer. The developer initially wanted to sell it as a complete turnkey package, but we found out by chance that the semi-detached house is still available, so we are stepping in now. This also means that we now have a say in everything else and can be involved in the planning. The shell with a fully basement is finished, the windows are installed, and the roof is also completed. The electrician started work yesterday. The house is being built as a KfW 55 energy-efficient house.

Question:
The developer planned a decentralized ventilation system, but according to them, it is not necessary to achieve KfW 55 certification and can still be canceled if we do not want it. The ventilation is done by individually installed, controlled room ventilation units with heat recovery.

We have read a lot about decentralized and centralized ventilation systems but are very uncertain. We ventilate at least twice daily and have never had problems in any rental apartments or houses so far. Therefore, we wonder if this system is really necessary. A centralized ventilation system would no longer be feasible at this stage of construction.

According to the developer, if we cancel it, the planned costs will be removed from our invoice, but we do not know for sure if they will fully deduct this because we do not know how much it accounts for in the overall calculation.

What are your thoughts on the decentralized ventilation system? Is it really useful, necessary, etc.?
Mycraft8 Nov 2019 14:11
Yes, there are many ways to reach the goal.
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Sternchen31
11 Nov 2019 09:52
How is it with the central ventilation system? It is often said that it is difficult to clean, which is understandable since you can't access the ducts. Bacterial contamination is also said to be a problem.

We will talk to the construction company tomorrow to see if a central system might still be possible.
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Bookstar
11 Nov 2019 09:55
Today's systems can usually be cleaned without any problems. Contamination is only an issue if filters are not replaced or if the system is off for an extended period. With proper use, this is not a concern.
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Snowy36
11 Nov 2019 19:10
But better decentralized than nothing at all....
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Sternchen31
11 Nov 2019 19:25
Hello,

We received feedback today that a central ventilation system is no longer possible. As a decentralized ventilation system, the PLUGGIT iconVent 160 would be installed. Does anyone know this system or have experience with it?
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Evolith
12 Nov 2019 07:14
We have the Pluggit unit and are very satisfied with it. But that probably won’t help you much.
Regarding whether to install one or not: definitely YES! Our neighbors don’t have one... you can notice it in the air.
Our heating technician once mentioned in passing that with modern construction methods, you actually need to ventilate every 2 hours to prevent mold and similar issues.