Fine-tuning underfloor heating in a new building through warranty? First occupancy

To my knowledge, a hydraulic balancing has been mandatory for new buildings since 09/2015. At least according to the energy agency. It is regulated here DIN 4701 / 10 VOB/C - DIN 18380 paragraphs 3.1.1 and 3.5.1

By the way, hydraulic balancing is basically pointless for a radiant floor heating system with individual room control. Except maybe with multiple circuits per room.

: I agree with you that the individual room control is pointless in a properly designed and balanced underfloor heating system. But it already fails at two points: 1. The IRC is mandatory (bureaucrats decided that again due to lobbying) and 2. the heating engineers usually increase the spacing of the pipes and then set the supply temperature to the upper limit to get the energy. But the customer only looks at the price and goes for the cheapest option (=> higher costs in acquisition due to longer pipe length and possibly more heating circuits). Very few people know the connections between supply temperature and pipe spacing ....

Say one of the following sentences if the protocol of the hydraulic balancing is not handed over unsolicited.
- I cannot find the protocol of the hydraulic balancing among the submitted documents. Do you have it with you?

- Please give me the protocol of the hydraulic balancing!

- Oh, you don’t have the protocol with you? Then I will record the absence of the protocol of the hydraulic balancing in the acceptance report of the apartment. [*wer schreibt der bleibt*]