ᐅ Ground source heat pump for a small single-story detached house

Hello

we are planning a single-family house (living area 120 m2 (1,292 sq ft), without a basement, with a currently empty, unheated but insulated attic). The house will be well insulated (Ytong + external thermal insulation composite system) and heated with underfloor heating. The plot is small (400 m2 (4,306 sq ft)) and I think a ground source heat pump with ground probes would be the most sensible option. With the installation of the ground source heat pump, I would not have to pay for a gas connection or chimney. The heating costs should be somewhat lower. A KfW subsidy might also be possible, or am I mistaken?

1. How much space would be needed inside the house for the installation?
2. Would it be possible to place this in the attic?
3. Since the ceiling is planned as a wooden beam ceiling, would reinforcement of the ceiling be necessary at that location?

Thank you.

Yes, that makes no sense at all. Only air-source heat pumps are a viable option here. For such a small house, geothermal energy would be extremely uneconomical—you might as well give your money to me 🙂

Thank you very much! What concerns us a bit are the additional electricity costs in winter.
If I understand correctly, the ventilation heat pump can be installed outside; how much indoor space is required?

blackarrow1990 schrieb:

Thank you very much! What worries us a bit are the additional electricity costs in winter.
If I understand correctly, the ventilation heat pump can be installed outside. How much space does it require indoors?

Both an air source and a ground source heat pump require about the same space indoors as a large refrigerator. So, not much.

The additional electricity costs in winter are essentially your heating costs for gas or pellets. This is similar for all heating systems.

Hello

I have a ground source heat pump.
Boreholes: 2 x 75 meters (246 feet).
The heating unit has a footprint of 60 x 60 cm (24 x 24 inches).
For a heated area of about 300 m² (3,230 ft²), my electricity cost is around 700 euros per year. My wife tends to feel cold, but the temperature in the house is always around 22.5° to 23° Celsius (72.5° to 73.4° Fahrenheit). An additional benefit: in summer, you can cool the house.
I would definitely do it again and recommend it to everyone.

Steven

60x60 cm (24x24 inches) is the standard size, right? I always see two components: the heat pump and the collector.
That’s very good, 700 euros per year for 300 m2 (3,229 ft2). But we would only have 120 m2 (1,292 ft2), and the question is whether a ground source heat pump is absolutely necessary.