Buildheat Demo Sites

Gleisdorf, Austria

Address

Rathausgasse 38, Gleisdorf. The residential building is located at the centre of Gleisdorf between Franz-Josef-Street and Rathausgasse.

Features

The entire building complex with a net dwelling area of 3,650 m² in solid construction was originally built in 1981. It consists of three buildings in which 53 dwellings with 2 – 4 rooms and a living area or 40 – 90 m² are located. Almost every apartment is equipped with a balcony or a terrace.

Climate

monthly avg. temp. Jan: 1.4 °C, monthly avg. temp. Aug: 17.8°C

H&C facts

The building is supplied by the local district heating system, which is powered by biomass and solar thermal energy. The heating is done by underfloor heating, for domestic hot water decentralized, wall-integrated hot water storage tanks (enerboxx / Pink GmbH) are installed, which are loaded via the two-pipe heating system. On the roof, a PV system of a local energy supplier is installed, but this is not intended for the cover of the building energy demand.

Retrofit package

In 2015, as part of an Austrian funding program, the renovation of the former retirement home was carried out to a passive house housing complex with the aforementioned 53 dwellings. A reduction of the specific heating requirement from 120 – 200 to less than 10 kWh / m²a could be achieved. At the same time, a complete conversion to renewable energy has been implemented and total energy consumption has been reduced by more than 75%. However, as currently there is no technology for intelligent control and monitoring of heating and domestic hat water preperation, as developed during the BuildHeat project, such a system will now be applied to the existing energy supply system.

Pinerolo, Italy

Address

Via Cittadella 19 Pinerolo ( TO ). The building is a multifamily house with 10 dwellings. The dwellings have different sizes, between 50 m² and 150 m² and are distributed in 1 staircases on 4 floors. The building is located near the city center on the hill of Pinerolo.

Features

The building has a reinforced concrete structure with non-bearing brick walls and flat concrete roof. Single-pane glass windows are installed. The building was constructed in 1965 and is owned by Eneralliaudi S.r.l. .

Climate

Monthly average temperature is 2.1°C in January and 21.3°C in August.

H&C facts

Single electric heaters are installed in each dwelling. The heaters provide Domestic Hot Water (DHW) water to all dwellings. The HVAC system is provided with condensing centralizer boiler and hot water radiators. The total normalized cost consumption for DHW and HVAC of every dwellers is about 1.500 €/year.

Retrofit package

Renovation includes upgrades for both external envelope and HVAC system. A pre-fabricated insulation will be installed on the south, east, nord and west façades, while the horizontal surfaces will be insulated with coat of EPS as well as the stairwell. Moreover, all windows will be replaced with double-glazed windows with thermal break. Each dwelling will have a centralized HVAC hybrid system boiler/ air-water heat pump connected to photovoltaic panels to cover the heating demands , and a centralized DHW Hybrid system boiler/solar panels to produce DHW demands.

Zaragoza, Spain

Address

Maestro Telleria, Barrio Oliver, Zaragoza. The building is a large multifamily house with 53 dwellings. It has dwellings with sizes of 85 m² and of 55 m². The apartments are distributed in 5 staircases on 4 floors. It is part of a small quarter in the outskirts of Zaragoza.

Features

The building has a concrete structure with non-bearing brick walls and flat concrete roof. Single-pane glass windows are installed. The building was constructed in 1988, is owned by ZAVI and is used for sheltered housing.

Climate

Monthly average temperature is 6.2°C on January and 24.8°C on August.

H&C facts

Single electric heaters are installed in each dwelling. The heaters provide DHW water to all dwellings and drive radiators in half of them, while, the rest is setup with electric radiators. Single split units provide cooling to a part of the dwellings. The average electrical consumption for every dwellers’ usage, i.e. lighting and appliances, per apartment ranges between 3,000 and 4,000€ per year and can go up to 7,500€ per year in some apartments.

Retrofit package

Renovation includes upgrades for both external envelope and HVAC system. A pre-fabricated insulation will be installed on the south, east and west façades. Moreover, all windows will be replaced with double-glazed windows. Each dwelling will have a de-centralized HVAC system being run by air-air heat pump to cover the space heating and cooling, and DHW demands.

Salford, UK

Address

Albion Towers, Cross Ln, Salford M5 4AH, United Kingdom. The Albion tower is a 17-storeys building with 100 dwellings, 2 bed flats. It is located in Salford, in the metropolitan area of Manchester. The building belongs to Salix Homes.

Features

The building has a concrete structure with non-bearing brick walls and flat concrete roof. External surfaces are not insulated and windows have single-pane glass. Asbestos has been found in risers while no fire breaks were found.

Climate

Monthly average temperature is 3.8°C on January and 15.7°C on August.

H&C facts

Space heating and DHW are covered by individual gas boilers. The peak power ranges between 3 and 6 kW of heat demanded per flat.

Retrofit package

The existing individual gas boiler will be replaced with water-to-water heat pumps. A water loop at building level connects the single heat pumps to a geothermal field. Boreholes for the ground exchange will be installed underneath the parking area adjacent to the building. Dwelling wall-mounted storages (140 liters) will be used to maximize the thermal storage capability of the heat pumps.