Floor construction in height with Vallox KWL pipe routing questionable

How high has the construction become?

17cm including parquet.

It will be a standard water-based underfloor heating.

There are more than 50 different options. Nothing is really standard with underfloor heating. But that's just a side note. I also suspect that no one has really read the plans, or there is a planning error.

Hi,

In the floor construction, you can hide a maximum of 5-6 cm of technology, no more. For screed including the underfloor heating pipes, you need about 7 cm (about 2 cm for the pipes and 5 cm as minimum coverage).

The current distribution boxes measure about 17-18 cm in height; if underfloor heating and screed are added on top, the planned 20 cm buildup would not be achievable.

Those boxes have absolutely no place there. Could it be that the "expert" is doing controlled residential ventilation for the very first time? Have them show you the complete plan with ALL calculations; I don't want to be pessimistic, but I fear a bigger problem is coming your way. It looks to me like someone completely botched the planning.

Best regards and good luck,

Andreas

After a brief consultation with the site manager, it is said that flat ducts are currently not available.
At these points, only 4cm screed is supposed to be applied and the underfloor heating is to be omitted. Since the boxes are now placed so close to each other, I am a bit worried that it will get warm at all in the bathroom due to the missing underfloor heating.

We have an appointment on site at 4 p.m., I am curious.

I would never allow that! The floor would be cold then! And I also share your concern that the bathroom wouldn't get properly warm.

In my house, the [Verteiler] hang from the ceiling in the utility room/[HAR].

Flat ducts cost significantly more than round controlled residential ventilation pipes, but they also do not solve the problem of air distributors in the floor structure (lack of coverage). Installing lower quality products with the excuse "not available" I personally find very strange. Above all, such a thing can/must only be done after prior consultation with the client.

I simply cannot imagine that this is supposed to be compliant with standards. Before further irreversible damage occurs (screed on top), I would discuss this not with the executing company but with an independent building services engineer or expert. There is an urgent need for immediate action here. A 40mm screed is theoretically sufficient, but not on an air distributor of the controlled residential ventilation because the lid made of thin zinc sheet metal (is it allowed to lie in the screed??) is not load-bearing. It has already been pointed out that a stable panel must be placed on top for load distribution.

P.S.: I also miss the acoustic decoupling of the pipes and distributors in the picture...