nordanney
2025-01-02 18:52:09
- #1
Just because it is approved (no matter what the ventilation concept according to DIN 1946-6 may look like...) does not necessarily mean it is good. For me, a controlled residential ventilation system is mandatory in new buildings, and buying a house without controlled residential ventilation is a deal breaker. Save on some "nonsense" in the house, like window sills, and invest in controlled residential ventilation. Even if it is only decentralized, because building the house is actually already too expensive for the income.We actually have KfW 40 without a ventilation system. It has also already been approved by the energy consultant. A ventilation system would cause approximately €13,000 in additional costs.