ᐅ Heat Pump Energy Consumption in 2019 on a Monthly Basis

You often read about energy consumptions going in the opposite direction, around 10,000 kWh for a medium-sized single-family house, like mine. Compared to that, I am doing very well with 5,000 kWh, but when I read here about people with similar houses using only 3,000 kWh, I start to think my heating system is not properly adjusted.

The actual consumption doesn’t matter much to me, and whether it costs a few extra dollars per year isn’t a big deal, but I would like to have a correctly adjusted heating system. It’s more about the principle for me. However, I can see that making comparisons is really not possible.

The question is: how can this be determined? Through the energy performance certificate / energy rating?

Additionally: It’s a KFW 55 standard house, occupied by 4 people, including 2 children. Adults shower once a day, children use the bathtub approximately every 2 to 3 days, exactly.

Do I try to optimize my behavior to reduce consumption? Not really. All rooms are kept as warm as my wife and children prefer, and hot water is used as desired.

However, all major energy wasters that can be avoided with good planning are absent: no buffer tank for the heating system, no circulation pump, no ERR (energy recovery system), etc. Instead, the bathroom features an additional wall heating installed flush, replacing the usual dust collectors, i.e., towel radiators. The underfloor heating is very well designed in terms of pipe lengths, which makes a huge difference; even at the lowest temperature, the supply temperature does not exceed 30°C (86°F).

Bookstar schrieb:

You often read about energy consumption figures that tend to go in the other direction, around 10,000 kWh for a medium-sized single-family house, like mine.

That probably refers more to heat energy than electricity.
In my opinion, 5,000 kWh of electricity for you is quite a lot.
What stands out is the 50 degrees Celsius (122°F) hot water temperature you have, which will be even higher during heating due to hysteresis/spread. That is unnecessary. Your consumption in summer, which should be only for hot water, also reflects this.

@Tego12, your setup and consumption are similar to ours. This shows how effective the planning is.

@Bookstar: besides the electricity consumption, you definitely need the heat quantity. Ideally with an additional heat meter. The meters in heat pumps vary in quality. Only in this way can you determine whether the heat pump is running efficiently or not. There are many threads about how to optimize the heat pump. Domestic hot water with circulation will have a big impact on your consumption. For example, we only need 20-30 kWh per month in the summer without circulation.

Comparing with each other makes little sense.

Where do I get the heat quantities from? In summer, we had 170 kWh of hot water per month, which is already five times as much as you. And we never take baths, just shower fairly thoroughly every day.

@guckuck: no, that was electricity, the thread is even here: https://www.hausbau-forum.de/threads/hoher-Stromverbrauch-der-Wärmepumpe.15833/

If you want to reduce your electricity consumption, have a heat meter installed. It can be a used one with an expired calibration certificate. Your heat pump might already display some values, though.