Carrer Nou

Last modified by the author on 21/06/2018 - 11:43
  • Building Type : Collective housing < 50m
  • Construction Year : 2017
  • Delivery year : 2017
  • Address 1 - street : Carrer Nou, 2 17001 GIRONA, España
  • Climate zone : [Cfa] Humid Subtropical - Mild with no dry season, hot summer.

  • Net Floor Area : 678 m2
  • Construction/refurbishment cost : 803 430 €
  • Number of Dwelling : 5 Dwelling
  • Cost/m2 : 1185 €/m2

Certifications :

  • Primary energy need
    111 kWhpe/m2.year
    (Calculation method : Other )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

Carrer Nou: The first multi-family building EnerPHit of Catalunya, located in the historic center of the Girona city. The work began in the summer of 2016 and has ended a year later. The building dates from 1978, the exterior walls are ceramic block finished with mortar to the outside and plastered to the interior. The interior slabs include a layer of terrazzo on unidirectional forging of concrete joists. PIR insulation panels have been installed directly on the inside of the existing wall, followed by a lining for the passage of installations also insulated with mineral wool and finished with plasterboard panels. The airtightness has been achieved by using acoustic membranes on the upper face of the slabs, the PIR taped together in walls and the existing, repaired plastering of the lower face of the slabs. The heating and cooling system consists of radiant panels supported by a battery included in the double flow mechanical ventilation system with heat recovery. Powered by an aerothermal heat pump and controlled by the mini web-server of the home automation control system.

See more details about this project,-rehabilitaci%C3%B3n-plurifamiliar-enerphit,-girona

Data reliability

3rd part certified


Construction Manager


Owner approach of sustainability

To perform an energy rehabilitation reaching a high level of comfort with a minimum energy consumption.

Architectural description

  • Vertical structure of ceramic loading walls.
  • Horizontal roof structure of reinforced concrete half-joists and concrete caissons.
  • Facades with continuous coatings.
  • Existing openings of important dimension.
  • Facing main facade to the south, to the street of 8 meters wide, that is, with minimum
  • solar contributions.
  • Action strategy:
  • Taking into account that the façade is protected by the Special Plan for the Protection of the Heritage of Girona's old quarter, all the insulation and sealing actions have been done inside with specific technical solutions that have forced to treat air tightness per floor.

Energy consumption

  • 111,00 kWhpe/m2.year
  • 235,00 kWhpe/m2.year
  • Other

  • 32,00 kWhfe/m2.year
    ACS: 6.4 KWHFE / M2.YEAR

  • 235,00 kWhpe/m2.year

Envelope performance

  • 0,19 W.m-2.K-1
  • U muros = 0.19 W / m2K
    U cubierta = 0.20 W / m2K
    U forjado inferior = 0.37 W / m2K

  • 0,28
  • n50

  • 1,00


    • Heat pump
    • Others
    • Heat pump
    • Solar Thermal
    • Reversible heat pump
    • Others
    • Double flow
    • Double flow heat exchanger
    • Solar Thermal
    • Heat pump

    The system consists of an air-water heat pump as production equipment, a fan with heat recovery and post-treatment water battery, and radiant ceiling plates to increase the cooling power of the system and cover the maximum thermal load in summer. The integration of the equipment and the control of the system is carried out with a domotic control unit, temperature and humidity sensors per room, and elements that act on the heat pump, the hydraulic circuits and the fan, giving information at a distance of real behavior of the system, and allowing the adjustment of the operating parameters to optimize its performance. This solution offers heating and cooling with the same terminal, working almost silently and at low temperature, giving high thermal comfort and good performance working with heat pump.

Smart Building

    A temperature and humidity sensor has been installed in each of the 5 rooms where the radiant plates are located (dining room, kitchen and 3 bedrooms). The temperature and humidity data allow to adjust the water temperature of the plates (acting on the position of the mixing valve) so as not to have condensations, without having to close circuits, thus avoiding start-and-stop cycles of the heat pump, which results in low performance thereof and shortened compressor life.

    At the same time, the fan is operated to lower or raise the flow depending on the thermal needs, with a programming (adjustable by the user) that prevents the fan from working in "party mode" during the resting hours. The control allows setting different setpoint temperatures according to schedules or according to occupation, in order to obtain the maximum comfort with the minimum energy consumption.

    The ventilation system works automatically with pre-established schedules, with the possibility of manual adjustment according to the occupation level, or the dehumidification needs.

    The user can control the air conditioning system and display temperature and humidity data by area, via a tablet fixed to the wall inside the home, or via a mobile phone from anywhere. The application is based on a menu system, quickly configurable and accessible.

GHG emissions

  • 22,00 KgCO2/m2/year
  • PHPP

Indoor Air quality

    The air quality is guaranteed with the double flow ventilation system with heat recovery, which contains F7 filters at the entrance.


    ComfoAir Q 600


    [email protected]

    The system of ventilation with recovery of heat of high efficiency is of Zehnder and is composed by a machine of ventilation ComfoAir Q 600 by apartment, silencers ComfoWell, a battery of water ComfoPost and a system of pipes of internal distribution and mouths of impulsion and extraction ComfoTube.

    The double flow ventilation system with heat recovery provides indoor air quality and comfort to users. The acceptance of this by the team at work was good.

    The Loxone control system


    [email protected]

    Domotic control system that allows quick installation, systems are easily expandable for the future and control is simple for users, who access and act on the system from a computer, tablet or mobile phone via Internet.

    The Loxone home automation control system allows easy handling of home installations.

Energy bill

  • 975,00

Urban environment

Historic center of the city of Girona.

Building Environmental Quality

  • indoor air quality and health
  • acoustics
  • comfort (visual, olfactive, thermal)
  • energy efficiency
  • renewable energies
  • products and materials

Reasons for participating in the competition(s)

​El edificio data de 1978, los muros exteriores son de bloque cerámico acabados con mortero al exterior y enlucido de yeso al interior. Los forjados interiores incluyen una capa de terrazzo sobre forjado unidireccional de viguetas de hormigón. Se han instalado paneles de aislamiento PIR directamente en la cara interior del muro existente, seguido de un trasdosado para el paso de instalaciones aislado también con lana mineral y acabado con paneles de cartón-yeso. La hermeticidad se ha conseguido usando membranas acústicas en la cara superior de los forjados, el PIR encintado entre sí en muros y al enyesado existente, reparado, de la cara inferior de los forjados. El sistema de calefacción y refrigeración se compone de paneles radiantes apoyados por una batería incluida en el sistema de ventilación mecánica de doble flujo con recuperación de calor. Alimentado por una bomba de calor aerotérmica y controlado por el mini web-server del sistema de control domótico.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Low Carbon

Low Carbon

Health & Comfort

Health & Comfort

Smart Building

Smart Building

Users' Choice

Users' Choice

Sustainable Renovation Grand Prize

Sustainable Renovation Grand Prize

Green Solutions Awards 2018 - Buildings

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Green Solutions Awards 2018 - Buildings