The heating system in this multi-family housing estate was completely exchanged.
In 2001, the whole heating system of the multi-family housing settlement in the quarter of Oberstrass in Zurich from 1928 was
renovated. Instead of simply exchanging the burners, a bivalent heating syste, was installed: Now a air/water heat pump provides
roughly half of the heat demand for Space Heating and Domestic Hot Water.
During the summer, the heat pump manages to provide all of the Domestic Hot Water demand; during the winter there is an additional gas boiler running. In addition to external air, residual heat from exhaust fumes is used as a heat source.
Key Facts
| Building | Heat Pump and Source | ||
| Location | Zurich, Switzerland | Hear demand for the whole urban settlement | 985 MWh/a |
| Construction | 1928 | Heating temperature | – |
| Renovation | 2001 | ||
| Project type | retrofit | ||
| Heat distribution | – | ||
| Heated space | – | ||
| No. of apartments | 12 MFHs with 82 dwellings | ||
| Level of insulation | – | ||
| Domestic Hot Water | Other Information | ||
| Coefficient of Performance | – | Type of system | mix |
| Refrigerant | – | Max. temperature | – |
| Gas boiler | 300kW |
Case study delivered by: energie Schweiz