AREA: 16,553.84 m2
PHASE: in use


Construction description

Concrete structure building with 5 + 4 floors and 147 rooms. ground floor+basement + terrace.

Uses distribution

Ground Floor: RECEPTION lobby, cafeteria, common areas, office, meeting rooms, dining room, toilets. Kitchen…

Level 01-Level 05: 225 rooms

Basement: parking, services room,laundry, disco, spa, nursery…

Envelope characteristics

The building is oriented to East. Brick faced facade without cavity nor insulation and an internal brick face rendered with plaster. Single and double glazing on top floors. Double glazing on groundfloor.

Building Systems

HVAC: Heat Pumps, VRV, Fancoils

DHW: 5 natural gas boilers, 2 Heat Pump

Lighting: mix of incandescence and LED lamps.


Even if the most part of the glazing units have been replaced to higher specs, most part are still medium to low performance double glazed windows and balcony openings without solar protections. It is proposed to install a solar control film, 3m or similar to reduce the radiation entering the precincts as well as solar protection like louvers and brei-soleil on the façade. It has a significant effect on the heating and cooling requirements for each activity.
Green roofing. Combining an earth substrate with insulation and vegetation improves the comfort perception while increasing the insulation performance and albedo levels. It has been implemented in the swimming pool above the basement, the technical floor, and the roof, reducing substantially the internal overheating of exposed areas.
Slab soffit insulation. Even if the building has been renovated recently there are some areas of the external envelope that have a low thermal performance. Some slab soffits are exposed to outdoor conditions, implying extra heating and cooling energy consumption to try to keep the different precincts inside the desire comfort conditions. Therefore, these slab locations have been insulated with 10cm of XPS boards, lowering the thermal bridge affection.
LED lighting and presence detectors. The luminaires are still the same following the documentation received by the owners. It is impressive how a well-structured LED lighting system can reduce dramatically the energy consumption. This technology combined with presence detectors on balcony and movement areas such as lobbies, create the perfect set up to save energy.
PVs integrated on roof. To complete the renovation renewable energy production the roof is used to install 300 PVs of 400w generating 640860.82 kwh/y.



Non-Ren Primary Energy: 27% energy savings

Heating: 2.5% energy savings

Cooling: increase of 9.5%

Ventilation: natural forced by the AC system

Domestic hot water: 49% energy savings

Lighting: 32% energy savings

PV Production: 138.1kwhPE/m2y

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 754159. The information in this publication does not necessarily represent the view of the European Commission.
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