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

Good day. Maybe someone here can give me some practical advice. I will soon be moving into a new condominium (Kfw70, pellets, underfloor heating, solar collectors for hot water) in a multi-family house. Is the heating usually set correctly or is there initially some kind of basic setting? I won’t need heating at all until autumn for the first time. Also, the heating will not be running at handover. So I don’t know whether the underfloor heating works at all or if it is set correctly. Since I am a layperson, I also don’t know whether it is set correctly at all - if it has been adjusted. Does adjusting the underfloor heating fall under warranty? Or can the heating engineer then issue me an invoice? And may I ask the heating engineer or the builder for a "heating/setting curve"? I could then have that looked at by a heating engineer. Many thanks erika

So probably there is only one major setting after calculating the heat demand.

You won't get more than that, because that's how the underfloor heating works... even if it's not necessarily efficient.

Everything else, meaning: hydraulic balancing, adaptation to your living habits, etc. is up to you, and whether you do it or not is your pleasure.

To my knowledge, a hydraulic balancing has been mandatory for new buildings since 09/2015. At least according to [Energieagentur]. This is regulated here DIN 4701 / 10 VOB/C - DIN 18380 paragraphs 3.1.1 and 3.5.1 Moreover, hydraulic balancing is basically pointless for a [FB Heizung] with individual room control. Except maybe in the case of multiple circuits per room.

Yes, of course it is mandatory, but the question is to what extent it is actually carried out. As I already wrote, it usually goes like this: an engineer calculates the system and informs the heating installer of the results, something like: circuit 1 5 turns or 0.5L/min and circuit 2 10 turns 1L/min.

This setting is then made and is essentially the rough setting to achieve the necessary temperatures.

However, an efficient heating system is something else... the first rough hydraulic balancing is just the first step. After that, it means observing the behavior and fine-tuning. Which, however, falls within the realm of one's own pleasure.

Im übrigen ist der Hydraulische Abgleich bei einer FB Heizung mit Einzelraumregelung an sich Sinnfrei.

You probably mean it that way, but on the other hand, an efficient heating system is exactly the opposite.

The sentence should therefore read: "Eine Einzelraumregelung ist bei einer hydraulisch abgeglichenen Fußbodenheizung sinnfrei."

: I agree with you that the individual room control is pointless with a properly designed and calibrated underfloor heating system. But it fails on two points: 1. The individual room control is mandatory (bureaucrats have decided this again due to lobbying), and 2. the heating engineers usually increase the spacing of the pipes and raise the supply temperature to the upper limit to get the energy. But the customer just looks at the price and goes to the cheapest option (=> higher costs due to longer pipe length and possibly more heating circuits). Very few actually know the connections between supply temperature and pipe spacing....

1. The ERR is mandatory

Well, not really... you can get rid of that nonsense at any time.

2. the heating engineers usually make the distances between the pipes larger and set the flow temperature to the upper limit to get the energy

Also not really... it depends on the individual case and not everyone is a black sheep saving money in the wrong place.