InDeWaG is the acronym of title "Industrial Development of Water Flow Glazing Systems" - Innovation action project funded under Horizon 2020, a Public Private Partnership on "BUILDINGS DESIGN FOR NEW HIGHLY ENERGY PERFORMING BUILDINGS". Support for innovation is provided to actions where partners focus together and join forces to remove existing barriers through market uptake measures in order to build capacity and provide support for sustainable energy policy implementation. Their mission is to foster sustainable energy investments and the uptake of technologies relevant to energy efficiency in buildings.

InDeWaG establish new technical knowledge and explore the concept of a new improved technology and product. Demonstration activity will show technical feasibility in a near to operational environment. InDeWag project introduce a new, disruptive building envelope system which has at least 15% building cost reduction potential and could be brought to industrial ripeness. The unique approach of InDeWaG is to enable maximum use of daylight by a transparent glass façade and at the same time meet nZEB performance. The consortium will undertake a quantitative analysis of different "modular" approaches: the active fluid flow glazing will combine water as heat transfer media with compressed air and solar-thermal energy conversion with BIPV (Building Integrated Photovoltaic), to enable the optimal ZEB performance for a multitude of building types in different climates.


The ambition of InDeWaG project is to bring to industrial ripeness a façade and interior wall system based on radiant heating and cooling glass surfaces made from water and/or air flow glazing, abbreviated as WFG and AFG, which harvests solar energy for various use at large scale. Such building elements will be made ready for commercial application in the building sector and will be designed to become easy adoptable for 21st century façade and overall building technology, especially for cost effective ZEB technology with increased daylight use, variable ventilation and individual control comfort. The benefits of fluid flow glazing façade technology were proven over the past 8 years on the level of few demonstrator projects, but there are still many difficulties for the right practical implementation.

The concept for extending the State of Art in water flow glass façade systems is oriented towards a system that will be able to satisfy the cooling requirements and the hot water needs for a whole building. This is achieved through the integration of a series of transparent, translucent or opaque solar thermal absorbers which operate at different nominal temperatures, namely 30ºC for heating and seasonal energy storage, 60ºC for sanitary hot water supply and 90ºC for cooling through absorption chillers. In this way, a complete glass curtain wall façade will be able to deliver all the levels of thermal energy required by a building while retaining its architectural aesthetics. In addition, implementation of radiant surfaces inside the building will be investigated by building simulation with IDA ICE and TRNSYS. The components will be tested in Demonstrators situated in two different climate zones - Bulgaria and Spain.

A proven design method, a tested and certified façade system unit, application possibilities and a focused market analysis are crucial for the fast market uptake of the Fluid Flow Glazing. The industrial development of this exciting façade technology is the main goal of InDeWaG consortium, enabling an important step forward towards achieving nZEB standard /stated by the 2020 EU policy in the Directive 31 from May 19th 2010/.



The main objective of InDeWaG is to develop an industrial technology for fabrication of cost affordable general-purpose Fluid Flow Glazing façade elements, which give maximum daylight utilization and maximum interior comfort at energy consumption level of nZEB. In addition, also interior radiant elements will be developed. This technical development is accompanied by the development of an open access software tool for design of buildings with this new type of façade and interior radiant cooling and heating elements.

The cost reduction of at least 15% is achieved by following the LowExergy9 principle and adjustment of the temperature difference between the exterior environment and the interior to a minimum value which is relevant for significant reduction of HVAC energy demand and lighting energy consumption.

  • About
  • Vision


MARCH 23-24, 2017

2nd Annual Innovative Glazing Global Summit, 23-24 March 2017 in Prague, Czech Republic

Some of the practical topics of this Summit for professionals include:
Sustainable Building and Smart Use of Glass, Facade Engineering in Modern Architecture, Global Glass Industry and Overview of the European Market, Glass and Its Role in Functional Office Buildings, Structural, Facade and Glass Engineering Challenges.

Dipl. Eng. Veneta Novakova (ETEM) will present InDeWaG on this event.


Dipl. Eng. Veneta Novakova (ETEM) presented InDeWaG concept in Singapore. She had the opportunity to raise awareness about the EU INNOVATION ACTION project InDeWaG in a several meetings held in a prominent companies in the building sector such as: DP Architects, Gensler and Inhabit.

JANUARY 16-21, 2017, InDeWaG@BAU 2017, MUNICH, GERMANY

InDeWaG at ETEM exhibition booth took place at Hall C1, booth 411 with the exposition of a real-size InDeWaG prototype. At EU projects shared exhibition booth of UBT (B0, booth 212), a functional 1:10 model of the Bulgarian demonstrator was exposed. Promotional InDeWaG materials - small note books 15x15 cm, pens with the InDeWaG logo and brochures, were distributed at both booths for visitors.

JANUARY 16-21, 2017

UBT (Chair of Materials processing) will be exhibitor of InDeWaG – at the European Construction Technology Platform Stand. BAU 2017 – World's leading trade fair for architecture, materials and systems, Munich, Germany. InDeWaG will be presented at ETEM Stand, as well as a Co-Exhibitor.


UPM–ETSIAE participated with a presentation for the wireless control device for the modular unit (InDeWaG) on the 5th International Conference on Electronic Devices, Systems and Applications (ICEDSA).

November 7-8, 2016


Dipl. Eng. Veneta Novakova (ETEM) presented the EU funded project InDeWag in a Training and consultation event in Sofia on 7th – 8th November 2016.

The presentation included detailed information for the research and industrial development of water flow glazing facades. The event was organized as part of the European project Step-2-Sport – renovation of private and public buildings aiming to achieve nearly zero energy consumption.

The target audience were professionals having interest in energy efficiency as well as general users not professionally involved in this topic.


Bulgarian-Indian Scientific Workshop: "Solar energy: strategies, research and applications", 7th – 8th November, 2016

Assoc. Prof. Dr. Maya Stoyanova (CL SENES-BAS) presented the concept of the EU funded project InDeWaG in a Bulgarian-Indian scientific workshop, which took place in Sofia on 7th – 8th November, 2016. The presentation gave an overview on the project objective for Industrial development of innovative façade technology for nearly zero energy buildings. The event was organized by CL SENES with the support of the Ministry of Education and Science of the Republic of Bulgaria. The workshop to "Solar energy: strategies, research and applications" and the target audience were scientists, involved in the topic of RES and energy efficiency, also stakeholders and broaden audience.

October 10-11, 2016


InDeWaG @ the Advanced Building Skins Conference in Bern, Switzerland, 10-11 October 2016

The project partners elaborated a common paper to be published in the conference proceedings. Architectonika team prepared a poster and Dimitar Paskalev (Architectonika) and Veneta Novakova (ETEM) held a joint presentation under topic D6 "Glass in Advance Building Envelopes" on the 11th of October (second day).

Official website of the event:

October 6, 2016

Universidad Politécnica de Madrid (UPM)
Escuela Técnica Superior de Arquitectura de Madrid (ETSAM)

Conference in Buenos Aires, 6th October, 2016

Title of paper: Water flow glazing active glass façades: their contribution to zero energy buildings (fachadas de vidrio activo con cámara de agua en circulación: su aportación a los edificios de consumo casi nulo)

Authors: Dr. Lauret Aguirregabiria, Benito; Dra. Ovando Vacarezza, Graciela; Dra. Pérez-Pujazón Millán, Belén Graciela Ovando, on behalf of UPM-ETSAM team presented a paper in buenos aires, (6th october) in the conference "XXX Research Conference and XII Regional Meeting SI+ Configurations, Actions and Accounts", held in architecture, design and urban planning faculty of Buenos Aires, Argentina. This paper makes reference to InDeWag project and its objective of developing an active water flow glazing façades for energy efficient buildings.