ᐅ Which Heating System to Choose When Building a House with a Heated Outbuilding

Hello,

I am planning to build a house within the next few months (about 4 months). The plot of land is already owned (30 x 50 m (98 x 164 ft)). I want to build a house (about 165 m² (1,776 sq ft) to KfW 40 standard) and an outbuilding (about 100 m² (1,076 sq ft) with standard insulation using 24 cm (9.5 inches) T10 blocks). The heating system will be installed in the outbuilding. Of course, both the house and the outbuilding should be heated. For the outbuilding, a heating output maintaining 10–12°C (50–54°F) is sufficient. The entire heating system will be based on underfloor heating. Which heating system would you prefer (gas, geothermal, etc.)? What should be considered?

Best regards, Fabian

Doesn't anyone have a suggestion?!

You won’t get a one-size-fits-all answer. If you want to achieve KfW 40 standard, you have to consider, for example, how you plan to use gas.

A planner is needed for that, and nobody here in the forum will do it for free. I also don’t know how the secondary building is factored in.