Room air-dependent chimney in KfW 40 house

Of course, I will ask about that. I thought you knew, then I would have saved myself the trip.

We use the Leda Luc 2 as an underpressure monitor. We get it from the chimney fitter. The bus cable is provided by the chimney fitter to the electrician beforehand, so everything can be prepared. No one has any problems with it. They have done it this way several times already. It is a construction by the architect and finally the general contractor is recommended/sought by the architect. The chimney fitter was recommended by the architect, although he was actually the most competent of the three we visited.

That may be true when building a solid house, but with prefabricated houses with a turnkey construction, you have no direct contact with any trade.

Hello Frank, found it:

Great, so only two-core? I'll have a five-core installed.