Learnlife Eco Hub: pop-up learning space

Last modified by the author on 18/10/2022 - 16:02

New Construction

  • Building Type : School, college, university
  • Construction Year :
  • Delivery year : 2022
  • Address 1 - street : Passeig Marítim nº 139-141 08860 CASTELLDEFELS, España
  • Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

  • Net Floor Area : 99 m2
  • Construction/refurbishment cost : 120 000 €
  • Number of Pupil : 1 Pupil
  • Cost/m2 : 1212.12 €/m2

Certifications :

  • Primary energy need
    85 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

Designed by Solange Espoille, Learnlife Eco Hub is a center for sustainability and innovation located in Castelldefels (Barcelona). It is a flexible Near Zero Energy Building (NZEB) with a non-permanent structure. A building with a very high energy performance, in which the small amount of energy required is largely generated from renewable sources on site.

The building has achieved Passivhaus Classic certification, which offers energy savings of up to 90% compared to conventional buildings, and digitization processes that simplify the entire construction process. To achieve an optimal indoor environment with high energy efficiency, the Zehnder ComfoAir XL 1500 and Zehnder ComfoAir Q600 ventilation systems were used. The Eco Hub consists of two industrialized modules with a wooden structure, built by Tall Fusta with healthy materials with low environmental impact. The windows are from Elke Wood Windows, with meranti wood carpentry, with double low-emissive glass with argon gas. Praxis has carried out the energy simulation in PHPP, the design of the thermal envelope and hermetic layer, advice on low-impact and healthy materials, and optimization and calculation of thermal bridges and construction details.

The purpose is to contribute to improving the environment, creating not only an innovative learning space close to nature, but also a sustainable construction that reduces CO2 emissions on our planet.

See more details about this project


Data reliability

3rd part certified


Photo credit

Jordi Vila and Marta/Argot Photo


Construction Manager

    Praxis Resilient Buildings

    Oliver Style y Bega Clavero, Calle Ramon Turro 100, 5-7 08005 Barcelona



Contracting method

Lump-sum turnkey

Owner approach of sustainability

The premise was to create a sustainable construction with materials of natural origin, whose production process generates less waste, requires low energy consumption and respects nature.

The building has been designed with the idea that it could be a reference model for learning about efficiency and sustainability, allowing its users to participate in the building's energy cycles and processes.

A basic rainwater harvesting system collects rainwater from rooftops and channels it into a large reservoir for storage. This system provides water to gardens as it contains no chemicals and does not harm the plant microbiome.

“Collecting our own rainwater is a great way to conserve this precious resource”

Energy consumption

  • 85,00 kWhpe/m2.year
  • 250,00 kWhpe/m2.year
  • Other

  • 42,00 kWhfe/m2.year
  • Heating demand: 12.6 kWh/m²
    Heating load: 20 W/m²
    Cooling demand: 16.2 kWh/m²a
    Cooling load: 11 W/m²

Envelope performance

  • 0,27 W.m-2.K-1
  • Fermacell gypsum fiber board. 13mm
    -OSB 3 wood board [airtight layer & vapor barrier]. 18mm
    -Wood fiber thermal insulation between wooden structure. 145mm
    -OSB wood board. 15mm
    -Waterproof & breathable sheet.
    -Chamber ventilated. 60mm
    -Thermo-treated wood. 15mm

  • 0,39
  • n50

  • 0,40


    • Heat pump
    • Tape
    • Individual electric boiler
    • Reversible heat pump
    • Tape
    • Double flow
    • Double flow heat exchanger
    • Solar photovoltaic
  • 89,00 %
  • Two BAXI NANUK RZGK35 cooling and heating systems with direct expansion cassettes as terminal system.

    The use of clean and self-produced solar energy from photovoltaic systems is maximized, reducing electricity costs and contributing to the protection of the environment.

    42% of the windows in this project face south, improving solar gain in winter. A sunshade was also incorporated to create shades on the windows during the summer.

Smart Building

    Electronic control systems have been incorporated to measure and monitor the interior environment, allowing optimal conditions to be maintained to improve results and performance. The monitor records data and reports on the dashboard allowing users to get an instant reading, as well as monitor trends and compare spaces with different environmental factors.

GHG emissions

  • 136,60 KgCO2/m2/year
  • PHPP

Water management

    A basic rainwater harvesting system collects rainwater from rooftops and channels it into a large reservoir for storage. This system provides water to gardens as it contains no chemicals and does not harm the plant microbiome.

    “Collecting our own rainwater is a great way to conserve this precious resource”

Indoor Air quality

    To achieve an optimal indoor environment, materials with low emissions of Volatile Organic Compounds (VOCs) have been used, together with a ventilation system with Passivhaus Zehnder ComfoAir XL 1500 component certification, which constantly renews the indoor air, with high energy efficiency. .


    01/07/2022 - 31/07/2022: Máximos de 494 PPM de CO2


    ComfoAir XL 1500

    Zehnder Group Nederland B.V.

    +31 38 429 6911


    PassivHaus certified ventilation system with sensible heat recovery.



    900 80 20 68


    Heating and cooling system with cassettes as an expansion system.


    Elke Wood Windows

    +34 931 358 610


    Carptintería de madera con una transmissividad de calor baja. (1.6 W/(m²K))

    Helical Piles

    Techno PIEUX

    [email protected]


    The ability to install the steel piles and build on top of them in the same day greatly increases production. Add in the fact that I save huge amounts of money and labor by not having to do earthworks, haul concrete and clean up the mess.

Construction and exploitation costs

  • 120 000

Building Environmental Quality

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

Reasons for participating in the competition(s)

Proyectado por Solange Espoille, Learnlife Eco Hub es un centro de sostenibilidad e innovación situado en Castelldefels (Barcelona). Se trata de un edificio de energía casi nula (NZEB), flexible, con una estructura no permanente. Un edificio con un rendimiento energético muy alto, en el que la pequeña cantidad de energía necesaria se genera en gran medida a partir de fuentes renovables in situ.  La premisa era crear una construcción sostenible con materiales de origen natural, cuyo proceso de producción genere menos residuos, requiera un bajo consumo energético y respete la naturaleza. Se maximiza el uso de la energía solar limpia y autoproducida de los sistemas fotovoltaicos, reduciendo los costes de electricidad y contribuyendo a la protección del medio ambiente. 

 Passivhaus sustainable construction energy innovation bioclimatic photovoltaic

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Author of the page

Oliver Style

CEO en Praxis Resilient Buildings

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