ᐅ Heat pump with deep geothermal drilling, solar system / pellet heating / supplementary support

Hello,

we are considering the following heating options for our house construction:

groundwater heat pump or a deep drilling heat pump

and

solar system with a pellet boiler as support

Here are the details of our house:

at least KfW 70 standard with 140–160 sqm (1500–1700 sq ft) and underfloor heating

Which heating option would you recommend?
Thank you for your answers.

Can you even apply option 1 in your area? As far as I know, that isn’t allowed everywhere.

...there is still a lot of information missing.

Can you share something about the estimated costs?
A pellet heating system with solar panels and the necessary buffer tank probably doesn’t cost more than a ground source heat pump with drilling.

After the heating load calculation, you will know the energy requirements of your future house and can also compare consumption and additional costs to some extent.

Personally, I would tend to choose the ground source heat pump with drilling. It usually has lower follow-up costs (maintenance) and often eliminates the need for a buffer tank. The technical room can be much smaller, and you don’t need a storage room either. This allows you to build smaller (saving money) or have more space available for other purposes. You also don’t need a chimney.

Furthermore, you might later increase your self-consumption with photovoltaic panels, especially in summer, running not only household consumption but also water heating through them. I’m not even talking about storage (batteries) yet.

This is just my opinion, without guarantee.

Best regards

Cascada schrieb:
...After performing the heat load calculation, you know the energy demand of your future house and can also compare consumption and additional costs to some extent.

A heat load calculation has absolutely nothing to do with the actual energy consumption!

Best regards

€uro schrieb:
A heat load calculation has absolutely nothing to do with the actual energy consumption!

Best regards.

Sorry – these terms can be confusing for non-experts.
Could it be the heat demand calculation, which also includes factors like desired room temperatures, floor coverings, etc. (which can/must be considered)?

Kind regards

Cascada schrieb:
Sorry – terminology is always tricky for non-experts.
Are you referring to the heat demand calculation, which can/must also take into account desired temperatures, floor coverings, etc.?

You seem to be the only one raising this or giving it much thought! Normally, my statement would have triggered an outcry from the community! But nothing happened ;-)
By definition, heat demand initially means energy, not power! This subtle difference alone has misled even some "experts"!
The parameters you mentioned form the basis for an accurate heating surface design (e.g., underfloor heating). The desired temperatures are anchored in the room heating load, which the heating surface design should correspond to.

Best regards.