The consumption is good for the heat pump, but it shows again that geothermal energy is not a good choice. It takes over 50 years to amortize. Especially for such small houses, it is economically nonsense.
How do you come up with 50 years?
That is just as much nonsense, claiming this without any background?!
Let me clarify this based on our case:
For example, we paid only slightly more for geothermal energy than for an air heat pump solution (also due to some own work).
But in general, even without any own contribution, it pays off in significantly less than 50 years.
You just have to find/have the right contact person and not blindly trust the heating installers, who of course much prefer to sell the "simple" air heat pumps because they have less work with them!
A deep borehole is usually much too expensive, for example.
Trench collectors are the benchmark here when considering cost + benefit.
As an example, a few facts about geothermal energy in general:
- Purchase costs for heat pump about €2000-4000 higher
- Development of trench including brine distributor etc. about €2000-4000 (depending on own work)
- BAFA subsidy for new construction €4500
- Usually longer service life than air heat pumps (but of course things can sometimes go wrong)
- Annual performance factor usually at least 1 better
In our case, we currently have an annual electricity consumption for heating of about 1400 kWh at 22°C in the living rooms and 44°C hot water.
Costs per year about €450
With an air heat pump, we would be at about €650 (assuming an annual performance factor of about 3.5)
So even in the worst case, you would be at a maximum of 20-30 years and not at 50??