Antica casa con fienile a Colonia

Cologne, Germany
Renovation of old house with barn 
Hydronic system - Sphera Box 
Year 2024

Air conditioning for residential

Complete renovation of old multi-generation house and barn in Cologne Pesch

Sphera Box cascade system with a total of 26 kW: year-round comfort and quietness

The challenge

The building was an old house from the 1970s of about 180 m², to which a former barn of about 300 m² was also attached.

After conversion, 340 m² were converted into 3 terraced houses, heated with underfloor heating.

The building is located in an enclosed inner courtyard, which increases noise amplification under normal conditions.

The challenge was therefore to meet the thermal demand of the three residential units, the domestic hot water requirements for 5 persons and to ensure quiet operation.

Casa a Colonia

After a detailed assessment of the renovated building, together with the customer we opted for a space-saving solution based on cascade-split heat pumps with a 16 kW Sphera Box as master and a 10 kW Sphera Box as slave unit.

The result

With this system, we were able to guarantee a pleasant indoor climate even on the coldest days and with a high demand for hot water. It was also possible, even under extreme conditions such as those of an indoor courtyard, to meet the customer's requirements in terms of quiet operation.
The cascade solution also made it possible to minimise the space required for the heating plant.

Protagonists

Architect: Josef Agnes
Design and realisation: Seckel GmbH
Installed units: Sphera Box 8.1T and Sphera Box 5.1