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Certification Monitoring

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Case Study: nZEC - New construction of 168 dwellings in Plaça Ovidi Montllor (Residence Alexandra), Barcelona, Spain (UNDER MONITORING)

Name of organisation: VIMUSA - Habitatges Municipals de Sabadell

Stage of development: completed

Year of finalization: 2010

Type of project: construction

Area: urban

Scale: group of buildings

Type of building: Apartment in a block of six to ten stories

Number of units/dwellings: 168

Tenure: private ownership by individual households

Street: Plaça Ovidi Montllor

Postcode: 08206

City: Barcelona

Region/ County: Catalonia

Country: Spain

Last Update: 20.04.2015

Certification Monitoring Thermal Insulation Windows and Shading Air Tightness Environmental Design Heating and Hot Water Cooling Ventilation Electricity Saving Products Water Saving Solar Photovoltaic

Short Description

The building, with a constructed area of 18.972 m2, consists in 168 apartments for social renting with one or two bedrooms and includes a public library, and elderly facility centre and 112 parking places.


Key Elements

Certification

The project, that has an “A” energy rating (certification issued by the “Institut Català d’Energia” won the Spanish Green Building Award 2010 in the category “Most innovative project”.


Thermal Insulation

Improved thermal insulation on roof and facades. Ventilated facades.


Air Tightness

Windows air tightness: 4


Windows and Shading

Motorized sun protection blinds.


Ventilation

Cross wind ventilation system in each apartment.


Heating and Hot Water

Heating floor system. Geothermal heating pump.


Cooling

Refreshment floor system. Geothermal heating pump.


Solar Photovoltaic

23 KW pic. Solar photovoltaic panels on the roof.


Electricity Saving Products

Energy saving lamps. Presence detectors. Leds exterior lighting.


Water Saving

Rainwater collecting tank of 30.000 litres for garden watering.


Environmental Design

Orientation, overhanging ventilated facades, sun protection blinds, Renewable energies, Water saving system in taps and toilet tanks.


Monitoring

Click here to access the monitoring data on the HIVE Database!


Main Results

Monitoring of the building has allowed us to compare the real energy consumption to an exactly typologies of dwelling built without those efficient construction systems and without using such efficient renewable energies like geothermal:

  • Kwh dwelling year = 2.505 (Heating, refreshment, hot water)
  • Kwh/m2 year = 35,66 (Heating, refreshment, hot water)


If we compare the real consumption between the 2 monitored buildings along one year we can assess that the savings are:

  • Energy savings = 59%
  • Euros savings = 35 %


Lessons learned

Additional Information

Ms Maria Jesús Gascó
AVS - The Spanish Association of Social Housing and Land Providers
E-mail: mjgasco@promotorespublicos.org
Web: www.promotorespublicos.org