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F2TE3. Highest efficiency and freedom in the design of buildings

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[F2TE3]Commercial_Sheet_UPM_EN(Innovatech) PDF

Highly transparent envelope facade system: 3,5 cm transparent facade that insualtes the same as a 30 cm conventional brick wall


A multidisciplinary research team from ETS Arquitectura and Facultad de Informática at UPM has developed an envelope facade system, superinsulating (80-91% higher than current solutions), with cost savings in energy efficiency up to 77%, and highly transparent (89% in light transmission). Moreover, it allows free-form designs for use in all kind of arquitectural projects. The construction sector business sector is growing at a rate of 4,4-5,1% worldwide, in particular, the glazing manufacturing sector industry.

In pre-production development stage, this solution has already been highlighted by the MIT (Massachusetts Institute of Technology), through its main developer, Luis A. Alonso, as one of the young people under 35 years most innovative of the year in Spain (TR35, MIT Technology Review).

Technology Solution

F2TE3 is a new lightweight, slim, high energy efficient, envelope system that provides for seamless, free-form designs for use in arquitectural projects. Its innovative design combines thermal insulation materials (encapsulated transparent monolithic aerogel) with new technologies (vacuum chamber) to provide a vacuum insulation panel  (VIP). The patented solution enables a complete facade system design, both in version transparent area for windows and opaque one for walls.

Model simulations ensure meet both spanish CTE (Technical Building Code) and UNE standards. F2TE3 technical performance provides highly relevant and specific values  in terms of acoustics, energy performance and light transmission.

“Energy savings through the building envelope with a minimum thickness (3,5 cm transparent facade that insulates the same as a 30 cm conventional brick wall) including free-form designs”


 Fachada transparente

Market demands

  • Energy inefficiency of building envelope solutions, particularly, the transparent ones. The challenge of curtain walls is energy saving and solar control to implement 20-20-20 targets by 2020 (reduce by 20% the primary energy consumption in the EU).
  • Current challenge of designing curtain wall facades in a more spectacular and visual way.
  • Improving the level of occupant satisfaction in buildings (for reference only, 27% higher in users of environmentally certified buildings) [LEED].
  • Adapting the living spaces to the current needs of users, both professionally and personally.
  • Structures with higher flexibility are required, in particular in geographic areas of greatest seismic hazard.
Market potential

  • The energy efficiency sector accounted for 1,8% of spanish GPD in 2012. From 2005 to 2010, it drove 1.500 M€ just in partnership collaborations. [Ministerio de Economía y Competitividad, Gobierno de España].
  • Worldwide, the construction industry worldwide is growing at a rate of 4.4-5.1%, in particular, the glazing area [Business Economics].
  • The overall doors and windows market is a global business valued at 60.000 – 94.000 M€, and a approximately 5% growth, half of it focused on windows [Business Economics]
  • Big companies in the curtain-wall industry account for 76% market, valued at 1.950 M€ at european level [Standard and Poor’s].
  • Spain is the second european manufacturer of windows, with an estimated 10% of production.
Competitive advantages

  • 80-91% more insulation than current curtain-wall systems, which implies direct savings between 42-77% (according to the British Fenestration RatingCouncil).
  • High degree of light transmission: 89% transparency.
  • Maximized solar control: reducing UV transmission up to 0% and IR transmission up to 10%
  • “Overlap” system between panels that is able to eliminate thermal bridging and to improve insulation in the union of those ones. This weakness has been detected in 90% of current commercial systems.
  • Almost 100% recyclable.
  • Soft covering: rigid and strict modules unrestricted.
  • High strength: best existing rating according to UNE-EN 1419:2004 standard.

“Improving insulation, energy efficiency and lifetime (5 times higher) than competing solutions, F2TE3 has a lower cost, around 1,4 and 3,7 lower than those ones”


  • Multidisciplinary promoter team of recognized standing in the fields of energy efficiency in buildings, manufacturing architectural panels and artificial intelligence and simulation.
  • Solution already highlighted by the MIT, through its main developer, Luis A. Alonso, as one of the young people under 35 years most innovative of the year in Spain (TR35, MIT Technology Review).
  • Best Presentation Award at 5th Global Institution Conference & Exhibition (London, 2010). 

  • Patent granted in Spain ES2398119 .
  • International patent applied via PCT PCT/ES2013/070906 WO 2014/102424
Development stage

  • Concept
  • R&D
  • Lab Prototype
  • Industrial prototype
  • Production

F2TE3 contact

Luis Alberto Alonso Pastor

ETS Arquitectura – UPM

e: luisalberto.alonso.pastorupm.es

UPM contact

Innovation, Commercialization and Entrepreneurship Area

Centre of Support for Technological Innovation – UPM


e: innovacion.tecnologica@upm.es

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