Change floor heating installation spacing

The contract says nothing about the handover or inspection of calculations. It states that a heat pump from Buderus 196i-AR13 will be installed and that underfloor heating will be installed on the ground floor and the upper floor, with a laying distance of 15 cm and 10 cm in the bathroom.

If that is the case, you will have to pay extra for a good system. The general contractor has no interest in this, as for most buyers only whether it gets warm probably matters. You might be able to use as a bargaining chip that, after a proper calculation, a smaller heat pump can be installed, and ERR and buffer are also omitted. So in the end, at least for the general contractor, the costs are lower. How much of that he passes on to you remains to be seen...

The contract does not mention handing over or inspection of calculations. It states that a Buderus 196i-AR13 heat pump will be installed and that underfloor heating will be installed on the ground floor and upper floor, with a laying distance of 15 cm and 10 cm in the bathroom.

This allows the general contractor to skip the heating load calculation. The question is whether he actually did one. The underfloor heating is currently being installed at our place as well. I spoke with the workers today. According to them, there are 26 heating circuits over 141 sqm with an average laying distance of 10 cm. A hydraulic balancing will also be carried out.

I think that and the foundation slab are the two things you don’t want/can’t redo anymore. :-)

Do you have an external construction supervisor from whom you can get advice?