Geothermal energy replaces oil in the old stock: Klaus

Reference: Single-family house in Klaus (AT)

In Klaus in Vorarlberg, Austria, a single-family house from the year 1954 was converted from an oil and wood heating system to a heat pump solution with geothermal energy. The heat source forms an borehole heat exchanger field with two separatus probes.

Particularly relevant for this existing project: According to the original, the existing garden area could be completely preserved.

Overview of project data

Probes: 2 × 100 metres
Drilling method / drilling: Hammer drilling with 114 mm diameter
Geology: Sandstone
Groundwater: from 40 metres below surface level
borehole grouting: thermally optimised with Fischer Geofluid
Heat pump: Stiebel Eltron WPE-I 12 H 230 Premium
heating capacity Heat pump: up to 12,7 kW
Buildings: about 100 m2 living space and about 50 m2 basement rooms
Modernisation of the building envelope: According to the project report, the windows had already been renewed around 20 years earlier. The report does not mention any further structural interventions.

Why this reference is interesting for modernizations

For existing buildings, the conversion to geothermal energy is often not only a question of heating technology. Often it is also about the practical implementation on an already designed property.

The original text describes two concrete project benefits here:

slim bores
Preservation of the existing garden

In addition, the original mentions the simple insertion of the probes into the borehole and the space-saving connection to the distributor as advantages of the chosen system design.

Classification

This reference shows that a geothermal solution in the old stock can also be implemented if existing outdoor plants are to be affected as little as possible. The statement explicitly refers to this specific project in Klaus (AT) and does not replace object-specific planning.