Geothermal heat pump, solar, and fireplace as heating?

This is a prefabricated house provider. Somehow I assumed that based on experience they would offer a few heating systems to choose from. When it came to the selection, the question arose for me: is the heating system sufficient for me? - You hear enough horror stories...

So I first tried to understand for myself what my house will consume and what kind of output the heating system provides.

In any case, NOW I have a good question for the builder:

On what basis is the proposal to offer THIS heating system in the prefabricated house made?

And for myself, I take away to describe the situation better next time.

Thank you very much,
haunt

This is a prefabricated house provider. Somehow, I assumed they would offer a few heating systems to choose from based on experience.

Of course, every general contractor/project manager does that. The question is only whether it is actually energy-efficient and cost-saving in consumption.

...When selecting, I then asked myself: is the heating sufficient for me? - You hear enough horror stories...

You only find this out if actual demand and consumption have been calculated reliably. Before that, it is all advertising nonsense or a look into the crystal ball! Whether one should base a major investment decision on this is something everyone must decide for themselves.

Best regards.

That means, I am now having a heating demand calculation made by the construction company, compare the heating solution, and then it's best if I have someone knowledgeable in reserve?

For the floor slab and co., I already have a building expert on hand. Can I rely on an energy consultant, or who should I best turn to?

Best regards,

Haunt

Hello,

That means I now have the heating demand calculation done by the construction company, compare it with the heating solution, and then it’s best to have someone knowledgeable as a backup?

There are different possibilities:
1. You have all necessary calculations presented by your provider and, sensibly, have an expert review them.
2. You agree with your provider that these calculations are done externally and that they install the system afterwards. After all, the revenue for this trade then remains in-house.
3. The trade is completely removed, which builders are doing increasingly, and fully outsourced. However, the provider then has the disadvantage that they lose this revenue. Therefore, their “credit” for this will likely be modest. Scaling down is usually unfavorable for the builder in general contractor/general planner projects. Scaling up, on the other hand, can make sense, i.e., ordering a closed shell and outsourcing the rest yourself. Here, the provider may still participate. These are usually regional general contractors/general planners. With large supraregional ones, you will have less luck here.

... Can I rely on an energy consultant or who should I best turn to?

Energy consultant is not a protected professional title. Anyone can essentially call themselves that, including a building material dealer or chimney sweep. However, they are not TGA planners. This requires several years of university study.
Suitable are small engineering offices from the region or internet-based ones specializing in small units. There are now several. Large engineering offices are less advisable and usually more expensive.

Best regards