Smart home for underfloor heating in a KfW40+ house?

Even though I agree with the content and myself have no ERR, it should be mentioned that these things are actually mandatory. Also directly veto against buffer tanks. Please do not believe that a shutter controlled via app constitutes a "smarthome".

And what is supposed to be smart about that? Radio in new buildings? More expensive than cable and more vulnerable. With a heat pump, you don’t need electric actuators. Here, proper design and hydraulic balancing are more important. Control only via flow rate and supply temperature.

I am a bit surprised about the many plus points for the heating engineer after such a simple, although correct, answer to the client. Have we already heard anything about the size of the heat pump? Heat load calculation yes/no? Etc.

that these things are actually mandatory.

Mandatory yes, but an exemption is officially possible (and is granted in 95% of cases, as long as you don't have a stupid planner).

Regulation yes, but an exemption is officially possible (and is granted in 95% of cases, provided you don't have a stupid planner).

I am impressed by your answer supported with a factor. Can I verify your 95% exemption somewhere as the result of a study or similar?

Can I trace your 95% exemption somewhere as the result of a study or something similar?

You can address a very well-known engineering office on the internet (with this success rate), additionally the experiences from another meeting point for building services enthusiasts. The exemption is relatively easy to obtain, but must be applied for individually for your own project. P.S. The exemption is explicitly provided for in the Building Energy Act text. Somewhere around § 100 +/-