I'm curious about the proposed solution. I have two independent plans from Zehnder and I would say... they are very straightforward But it could be solved through discussions.
A slot in the exterior wall is by far not enough. You might fit a flat duct in there, but you need one per room. Or two 160mm(?) pipes go into the upper floor and from there to a distributor (where?!), and then from there into the rooms. There are also distributors that can be cast into the concrete, but that has to be right, clarified with structural engineers... and leads in the upper floor to floor outlets and the expensive flat duct system under the screed.
I really appreciate my flat concrete roof, where the cheaper round pipes with ceiling vents can be easily embedded in or on the concrete.
Or do you perhaps have suspended ceilings in the upper floor?
Hi Alex, round pipes will be used as with you, which will be cast into the concrete ceiling. Here the architect made the first mistake. Because the ceilings including reinforcement in the basement and upper floor are not 22cm like in the ground floor. Fortunately, this was noticed by the shell builder on Monday. Otherwise, the ventilation pipes would not have fit.
All ceilings are concreted. That means the roof structure is not part of the thermal envelope.
By the way, the holes in the ceilings will cost me an extra €40 net each hole. Costs for slots in the walls for supply air unknown. But they are supposed to be positioned below the windows.
: I just noticed that too. Can someone move this?