Gas or geothermal energy - advantages / disadvantages?

I doubt that a "professional" would recommend a trench collector. It has not really caught on with the specialist companies in Germany yet...

I think so too. At the moment, it is probably still purely a DIY thing. Even though it is often significantly cheaper and quite effective!

What does your gut say? It’s not all a matter of calculation, but also the feeling with which type of heating you feel most comfortable in your mind.

Thank you very much for the feedback so far.

Friends of ours have a geothermal heat pump with ground collectors and are enthusiastic. After dealing with the topic, I am also intuitively in favor of geothermal energy. Due to the property, this is probably only possible with probe drilling. Since I am currently doing my training to become a certified accountant, I keep being told that every investment has to be mathematically worthwhile... but calculated over 20 years, no investment clearly stands out from the others. Therefore, I am also dependent on the experiences of previous home builders. I will probably wait for the heating load calculation first and get binding offers. Then I will see further.

I doubt that a "professional" would recommend a trench collector. It is not really established yet among the specialist companies in Germany...

Okay. With us, however, it was actually mentioned during construction. But maybe that was indeed the famous exception.

Actually, it wasn’t necessarily about the topic of surface collector or trench collector or drilling. It was more about first creating the prerequisites in order to actually be able to compare and decide. That means: heating load calculation and checking what is possible and feasible with which technical and financial effort. Then you can compare and decide.

What does your gut say? It’s not all a matter of calculation, but also the feeling about which type of heating you feel most comfortable with mentally

I absolutely agree with you.

I’ll probably wait for the heating load calculation and get binding offers. Then I’ll see.

That’s a good plan.

Moreover, friends have told us that the air heat pump sometimes fails to provide enough warm water for a household of 4 people (e.g. when everyone showers one after the other after a bathing trip)

But that also depends on the storage volume and the target temperature! Whether you have 100 liters or 270 liters of volume makes a difference, as does whether the water is stored at 55 degrees or "only" 40 degrees (i.e. whether more or less cold water has to be mixed in at the faucet). We have 270 liters, and when the two adults shower and the two children bathe together, there is still warm water flowing... After that, the device runs for about 3-4 hours to reach the 55-degree target temperature.

Hello,


Where do you get this data from? Heat pumps have not been in use long enough for reliable statements regarding their service life to be made.


Air-to-air heat pump or air-to-water heat pump? With what storage volume for domestic hot water?

Rhenish greetings

What do you mean by "data", these are estimates from the site manager, which were confirmed by the heating installer. An air heat pump works like a refrigerator, only reversed. Such a refrigerator can also work reliably for 20 years, but can also quit after 10 years.

I did not inquire about domestic hot water storage volume. The very idea of standing there without hot water when guests are visiting (and we have a large family and correspondingly frequent overnight guests) totally deterred me.

What now deters me more is the Russia crisis. But well, the gas heating is already in operation.