Detached house on the island of A Creba

Extension + refurbishment

  • Building Type : Isolated or semi-detached house
  • Construction Year : 2014
  • Delivery year : 2015
  • Address 1 - street : 15250 MUROS, España
  • Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

  • Net Floor Area : 516 m2
  • Construction/refurbishment cost : 144 264 €
  • Cost/m2 : 279.58 €/m2

Proposed by :

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

A creba Island or Illa da Creba, is a Spanish island in the province of A Coruña. It is located on the estuary of Muros and Noia, 240 meters from the shore of the parish of Esteiro. With an area of ​​7.5 hectares, it is topped by a large house. It is a building constructed in the early 80s, with a floor space of 516 m² spread over 5 full bedrooms, kitchen, living room and technical areas an an outdoor pool of 35 m². The aim is to replace the existing energy source with a total dependence on oil, comprised of a generator and diesel boiler by other existing sources of renewable energy on the island, always searching, when possible, the energy self-sufficiency, which is achieved in most part of the summer period (May -September).

Data reliability



Contracting method

Other methods

Owner approach of sustainability

The main objective of the promoter is self generation of the energy necessary for the proper functioning of the housing, showing the utmost respect for the environment and the natural environment of the area in which the house is located. Until now, all the services enjoyed by the house were totally dependent on fossil fuels, particularly diesel, and given the location in which it is located, supply had to be transported by boat. All these constraints meant that housing facilities proved to be totally ineffective, causing significant economic cost and considerable CO2 emissions into the atmosphere.

Architectural description

The house dates from the late 80s and is in good condition, so the only architectural reform is done in the kitchen, in order to adapt its conditions to a continued use of housing. It is a large house that has traditional bioclimatic strategies such as the high thermal inertia of its stone walls and the existence of local wood fireplaces.

Energy consumption

  • 117,04 kWhpe/m2.year
  • 133,41 kWhpe/m2.year
  • Primary energy needs

  • 133,41 kWhpe/m2.year

Envelope performance

  • 1,58 W.m-2.K-1


    • Water radiator
    • Wood boiler
    • Solar thermal
    • Solar Thermal
    • Wood boiler
    • No cooling system
    • Double flow heat exchanger
    • Solar photovoltaic
    • Solar Thermal
    • Micro wind
    • Biomass boiler
  • 100,00 %

Smart Building

    Facilities include remote control via web, so that the user can access it at any time and know the consumption of each of the energies in both real-time and historical.

GHG emissions

  • 2,03 KgCO2/m2/year
  • Final energy conversion to CO2 emissions (not densified biomass).

Indoor Air quality

    The air renewal system is modified by including air renewal equipment with heat recovery and complying to current regulations filters.


    HDG Euro log boiler


    [email protected]

    Climatización / Calefacción, agua caliente

    Biomass boiler with the possibility of burning wood logs up to half a meter, forest residues, wood chips and briquettes.
    Comfortable filling with wood logs and overturned by a gate with pneumatic filling device.
    Combustion control with lambda probe, including lift and return temperature waste heat utilization.
    Long maintenance intervals thanks to large ash compartments.

    Product accepted as first choice for brand recognition.

    Solar thermal collector DIETRISOL PRO C250V

    De Dietrich

    Climatización / Calefacción, agua caliente

    High performance, flat solar collector with flat aluminum absorber with selective coating and monotube exchanger with sinusoid form. Back Rockwool insulation 40 mm thick. Absorbing surface of 2,354 sqm, and optical performance of 0.819.

    Product accepted as first choice for brand recognition.

    DHW instantaneous production STIEBEL ELTRON


    Acabados / Fontanería - Instalaciones sanitarias

    Accumulator for production of instant ACS 1,500 liters.

    Product accepted as first choice for brand recognition.

    Collector Schüco MPE PS05 Solar photovoltaic


    Schüco Iberia S.L. - 91 808 40 20

    Acabados / Equipo electrotécnico (corrientes fuertes / débiles)

    SCHÜCO Photovoltaic solar collector MPE PS05 power of 210 Wp. polycrystalline solar cells with high performance. Aluminum frame torsion-resistant and corrosion anodized.

    Product accepted as first choice for brand recognition.

    Aerogenerador ANELION SW3.5-GT


    Francisco Climent - 607 65 75 13

    Acabados / Equipo electrotécnico (corrientes fuertes / débiles)

    Miniaerogenerador ANELION SW3.5-GT 500 Wp power, valid for isolated systems and networking. High energy efficiency and low noise. Active electronic braking system. Dual redundant system electrical / mechanical passive safety.

    Product accepted as first choice for brand recognition.

Construction and exploitation costs

  • 57 000,90

Urban environment

A Creba Island is a unique attraction formation from the landscape point of view. It is an excellent vantage point for a wide panoramic view of the bottom of the estuary of Muros and Noia. The history and legends around this island give the place an aura of mystery and charm.

Building Environmental Quality

  • biodiversity
  • energy efficiency
  • renewable energies

Building candidate in the category

Energía & Climas Temperados

Energía & Climas Temperados

Edificio Inteligente

Edificio Inteligente

Green Solutions Awards 2017 - Edificios

Author of the page

  • María J. Maroño Breijo

    Responsable de Certificaciones Ambientales LEED y VERDE


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    Green Solutions Awards 2017 - Edificios