Air-water heat pump current consumption and data

I can understand the checking thing. I also check the heating at least 5 times a day.
My wife is even more annoyed by it than I am :rolleyes:
Except for the defective sensor, the system runs great in terms of consumption !

Here is my current status:
In the last few days (always around the freezing point) I had a daily consumption of 20-28 kWh including hot water.
COP always between 4.0 and 4.6
SPF currently at 4.3

But now comes the catch! My heating curve is terribly high:

18°C = 30° flow temperature
0°C = 35° flow temperature
-15°C = 38° flow temperature

I’m surprised that my consumption isn’t around 35-40 kWh :p
ERR active
Buffer active
Bathroom 23.2°C
Bedroom 18.5°C (right next to the bathroom)
remaining rooms 22°C

39 heating hours with 7 cycles.

Edit: but I also set a hysteresis of 3K to extend the runtimes. That is certainly also the reason for the relatively low consumption

I can understand the checking part. I also go to the heater at least 5 times a day. My wife is even more annoyed by it than I am :rolleyes: Except for the faulty sensor, the system is running great regarding consumption ! Here is my current status: The last few days (always around the freezing point) I had a daily consumption of 20-28kWh including hot water. COP always between 4.0 and 4.6 SPF currently at 4.3 But now comes the catch! My heating curve is terribly high: 18°C = 30° flow 0°C = 35° flow -15°C = 38° flow I’m amazed that my consumption is not around 35-40kWh :p ERR active Buffer active Bathroom 23.2°C Bedroom 18.5°C (right next to the bathroom) remaining rooms 22°C 39 heating hours with 7 cycles.

This is probably only due to the active ERRs. Check how many VD starts you have. I had 60 per day; if I had let it run like that, the heat pump would have been ruined after a few years. Now I have 4 pieces in 48 hours. No problem with that. Hysteresis 2K. It should go down to 1.5K and block hot water at night, but at the moment I don’t care.

is at the very bottom of my post. 39 heating hours with 7 cycles. But I am already curious to see how it looks during the transition period...

Does it make sense to integrate the HTHK into the return flow of the bathroom heating circuit? That way I would have at least a few more watts in the bathroom and a larger temperature difference.

We already discussed this topic in your thread, didn’t we? Your bathroom has too little installation spacing, and with HTHK there is a risk that the heat pump will start cycling again because the return flow rises too strongly and quickly due to the short heating circuit.

Wasn't the consensus that you can significantly lower the flow temperature if you make the bathroom cooler or need an electric HTHK?