Case Studies examples


  • “Hot Ice Wize” is focused on the use of latent heat with two ice storages and two heat pumps in combination with unglazed solar collectors and a PV system. It is designed as a pilot project for local heat supply. (more)
  • Vögelebichl multi-family houses are the first in the world responding to the Passivhaus Plus Standard. Furthermore, the buildings were designed to achieve the annual net-zero energy balance thanks to on-site renewable energy generation. “Vöglebichl Multi-Family Passive Houses” are located in Innsbruck, Austria. (more)
  • The residential building “D12” is a block of 7 buildings with 4-6 storeys each, commercial use on the ground-floor (GF) with 8 shops on 900 m2 and 213 flats on the upper levels. The (conditioned) gross floor area is about 20,600 (19,080) m2. The building is located in Vienna/Aspern Seestadt. (more)

Denmark (more information soon)


  • A new built private housing is located in Marseille, in the South-East of France.  The hot water production is arranged by a solar heat pump. For this installation, climate and sunshine are very favorable. Thus, solar panels are installed on the building roof. (more)
  • The district heating system, specific to this eco-district in Roquebrune Cap Martin (Nice) is quite innovative. It is based on the treated water rejected by water treatment plant located 500m far from the ecodistrict. This water is used as the cold source of 8 heat pumps for DHW production and 5 heat pumps for heating and cooling. (more)
  • In Soissons, heating is supplied by a renovated district heating grid connected to a wood-fired heating plant. The DHW production was ensured by individual electric water heaters until now. The replacement of these by a collective heat pump induces a 50% reduction on the electric bill due to DHW production. (more)
  • Opened in mid 2018, a senior-living building in La Ciotat is another good example for heat pumps in civilian residential buildings. A 60m² solar panel is providing energy for the two heat pumps. (more)


  • Over a net floor area of 3248 square meters a heat pump cascade system provides warm water, pleasant room temperatures and enough energy for the catering business on the ground floor of the new holiday home Boarding House Potsdam”. (more)
  • Between 1881 and 1966 children were taught inside this old school building in Kempen, which is now listed. In the meantime, the building served as a church, community administration and youth hostel. In 2008, the house was finally rebuilt by its new owner into a multi-family house with five residential units. After the existing building had been heated over the years with an oil heating and district heating, the decision was made to use a heat pump as an environmentally friendly solution. (more)
  • If former industrial and commercial areas are overbuilt, entire districts are often created in a very short time with a distinctive atmosphere and modern flair. This is also the case in the Düsseldorf district of Derendorf, where the discarded freight yard makes way for the “Neues Düsseldorfer Stadtquartier”, which heavily relies on heat pumps. (more)
  • Not infrequently, new buildings attach great importance to efficient insulation and environmentally friendly energy production. In Bruchköbel, the builder himself, with the help of his own construction company, has set himself the task of equipping his new building with advanced energy systems. (more)
  • Seven new buildings were built in Petershagen in northern Germany, each with a heat pump and photovoltaic systems on the roofs. Six of them contain apartments that are specially adapted to the needs of older people and the seventh is a community building. (more)
  • These two buildings form part of a cluster of five large renovated multi-family buildings from the 1960s within the Karlsruhe district Durlach, where an integrated energy system is demonstrated within the research project “Smart district Durlach”, Ersinger Street 2 and Ersinger Street 4.
  • In August of 2015 the five-storey multi-family residen- tial building (17 apartments) was commissioned. The all electric building is equipped with a 50 kWth electric brine-water heat pump that uses a total of 85 m2 of solar absorber in addition to an ice storage as heat source. The“nZEB multi-family houses” are located in Riedberg, Germany. (more)

Netherlands (more information soon)

  • Wegener Sleeswijkbuurt
  • Sculpturen
  • Couperus
  • Jacques Urlus Plantsoen
  • Leyhoeve


  • The project in Daru, Geneva concerns the replacement of an existing gas heating system by a hybrid HP+gas solution in an existing multifamily building. With the goal of having the maximum annual heat production from HP origin, six air/water heat pumps were implemented on the rooftop. (more)
  • The project in St. Julien, Geneva concerns the replacement of an existing oil heating system by a HP only solution in a multifamily building. With the goal of having the total heat production from HP origin, two air/water heat pumps were implemented on the rooftop. One of the previous fuel oil boilers was kept for back up. (more)
  • In Zurich, three heat pumps were built on top of an living unit from 1982 in 2016. The whole construction was also completely revemped by adding new floors, windows, insulation, solar panels and air conditioning. (more information soon)
  • Another older example from Zurich is a multi-family housing scheme, which was built in 1928 and modernized in 2001. The new heat pump is able to provide all required hot water at least in the summer months. (more information soon)
  • In Bern, an old oil heater was replaced by a new heat pump. Although the heat pump is not directly located at the building, it is still possible to transport the heat into the apartments by a pipe system. (more information soon)
  • Three connected buildings from 1963 were renovated in 2013. The workers improved the insulation, canged the windows and added two heat pumps. The solar panels on the roof are able to provide 148% of the required energy for the 18 households. The construction is also located in Bern. (more information soon)
  • The first MINERGIE-A® building with office use in canton ZH, located in Uster, has been monitored for two years from May 2014 – April 2016. The all-electric building is equipped with a 33.1 kW ground-source heat pump (B0/W35) a 24 kWp solar PV-system and a 7.1 m2 PV/T-collector for domestic hot water (DHW) preheating. (more)
  • The multi-family house has four apartments and is equipped with a geothermal heat pump with two bore- holes of 225 m each for space heating and DHW production. The multi-family plus energy building Allmendholz is located in Horgen, Switzerland. (more)

UK (more information soon)