Air-to-water heat pump sizing in new construction

Hi, I found something else in the thermal insulation calculation. Is that the Ht value???

So you would prefer the Wolf CHC Monoblock over the Daikin 8kW if I can get it in the 7kW version instead of the 10kW?

You reduce the required room temperature to reduce the heating load? If now the 20 degrees are not enough, you have a cold house and a heat pump running at 99% max. Better everywhere the laying distance at 7cm or even 5cm and then throttle the heating circuit.

It is (at least for me) about a tactic to get the respective heating technician to set a lower supply temperature by indirect means and then accordingly plan it that way. So if he already says that we won’t be able to go below 35° supply temperature, how I can then manipulate it with other parameters that I give him in such a way that I can still set the supply temperature to 30° afterwards and achieve my desired temperatures.
So 20° would be too cold for me, for example. It might even be better for me to say, okay, just do 35°, but definitely not more, and I want 23° everywhere?


I can’t directly contract anything with the heating technician. All I can do is communicate wishes (temperature) or special requests (upgrades) to him...
Whether I can tell him exactly how to plan, I’m not sure. Allegedly, he does a room-by-room heating load calculation, although I think he has it done by the manufacturer...

- Room-specific heating load calculation according to DIN
- 30/27/21 (flow temperature/return temperature/RT) or 30/27/23 in the bathroom
- Set heating circuit length to 80m/circuit ±10%

Is it possible to get that included in the contract with every general contractor? It will probably be the exception that a general contractor lets themselves be contractually bound like this, or they will charge a high price for it. Question to the group, what are your experiences?