Air-water heat pump current consumption and data

We have "short paths" and deliberately no circulation.

Our heat pump has been running for 12 hours. It started yesterday evening at half past 9, last night it was only 2.5°

How did you set your hot water circulation? Something like that can also be a real energy hog.

Once a day for 20 minutes, because it has to run, in the afternoon, to ideally trigger hot water preparation at the warmest time. I wouldn't have needed circulation, but I wasn't allowed to remove it during the general contractor phase :rolleyes:

... and here we go again at the [Luft-Wasser-Wärmepumpe Stammtisch] :)

I have now evaluated my [Luft-Wasser-Wärmepumpe] in the 205m^2 KfW55 house for one year, from November to October: Electricity consumption for heating including hot water was 3300kWh (separate electricity meter), annual performance factor was 4.2. The annual performance factor was slightly reduced by a high standby consumption for an oil sump heater in the heat pump.

According to the internal heat meter of the heat pump, a total of 14000 kWh was generated in 12 months (composed of 12100kWh heating energy and 1900kWh hot water).

Annual performance factor is as expected. The heating demand, however, is somewhat higher than I would have expected. Was I too optimistic, or do I have hidden thermal bridges or did the construction moisture in the new building increase the heat demand in the first winter? We always heated to about 22 degrees.

Do you have comparison values?

For us, it is now from 31.10.20 - 21.10.21 ~3500kWh, slightly more than originally calculated. We have a total of 218m² heated area. In general, we keep it rather warm in the house at 22-23°.

Electricity consumption: 3,500kWh
Heat generated: 15,000kWh

Coefficient of performance: 4.28

Unfortunately, I cannot say exactly how much electricity comes from the photovoltaic system. Certainly, it is not more than 20%.

Here are my notes 13799 kW heat quantity with 3790 kWh electricity thereof

250m2 Kfw 70 but timber frame, which are basically better. 5-person household with 2 small children, so often additional heating in the bathroom that runs on the same electricity meter. And 300 liters buffer, which still ran with circulation in winter.

I think optimization is still possible with a thermal balancing in your case.

We have a total of 218m² of heated area. Generally, we keep it rather warm in the house, around 22-23°C.

Electricity consumption: 3,500kWh
Heat generated: 15,000kWh

What energy standard do you have? Old building or new building? Interesting comparison values.