Air-to-water heat pump sizing in new construction

Overall, pretty decent. However, I don't understand why the bathtub and shower are not allowed to heat the bathroom. Could it be that they lack the construction height? Sometimes both are located lower than the floor.

Now only one wall in the bathroom would have needed to be covered, then it would have been perfect

Principle, guarantee, always done differently? He just didn't want to because the bathtub is set into the Styrofoam thing and he can't imagine any loops underneath it. Stability, etc.? I even understand it a bit with the shower. There the drain with the shower channel is recessed. Then the tiler has to install it and also create the slope. He probably doesn't want to mix trades there.

Now only one wall in the bathroom would have needed to be covered, then it would have been perfect

It is even. ;) Post

So, now please stone me. First of all, the buffer tank has arrived.

To prevent lengthy discussions about the nonsense of it: the heating technician did not agree to do without it. It is installed in the return flow. You can't always win, and after 5 years the warranty is over and I can have it disconnected.

Yes, same for me. Back into the return flow for through-flow and with the size (50l?) actually not so bad. But why is that a separate thing? The heating engineer told me that it’s integrated in the Unitower? Or did you actually get a bigger one? Oh, and have you heard anything about delivery difficulties? My fellow builder, who still has to make do with the house and yard heating engineer of our general contractor, said that he can’t get the heat pump. That’s why he has to run the heating program now with a flow heater on the construction electricity (which we use together :rolleyes: o_O).

50 liters in the return flow, not installed in parallel as a manifold, and then even physically separated from the rest of the system is by far the least critical way to integrate a buffer tank. So it's really not a big deal and well done by the plumbing. I would even recommend this to anyone who has actuators on the heating circuits, as it can never be completely ruled out that errors or mishandling occur.

So: Well done! No complaints from me. ;-)