Smart Films and Circular Windows for Energy Efficient Building Renovations (SFEER)

Will we have circular windows?

Improving window insulation and solar heat control is a great energy saver. Would it not be great if we could use a circular window system to do this? The partners in the SFEER circular windows project think so! With the help of the Topsector Energie subsidy from the Ministry of Economic Affairs and Climate within the MOOI program, 12 partners will develop a circular window renovation concept making it possible to reuse old glass panels and upgrade them with insulating coatings and smart solar heat regulating films.

Why we work on circular windows?

In buildings, windows are one of the components most vulnerable to energy loss. Many of the existing façade windows in the Netherlands consist of low-quality systems that no longer meet energy performance standards. Therefore, a large part of the existing glass used in buildings has to be replaced. New circular window products provide a viable way to do this. By deploying circular windows, we can accelerate renovation processes and reduce the environmental impact of replacement.

A circular renovation concepts

Within the SFEER circular window project we are developing a circular window renovation concept. This involves developing a process to reuse existing glass panels in new windows, and develop new smart window products to renovate and upgrade windows for optimal energy efficiency and comfort. The SFEER project is developing an innovative thermochromic PVB film, as well as two types of smart retrofit window films, which will contribute to lower emissions. The impact potential of the films will also be quantified during the project.

Who make it possible?

Our efforts are made possible through funding provided by the Topsector Energie subsidy from the Ministry of Economic Affairs and Climate within the MOOI program.  This support makes it possible for a large group of companies, universities and research institutes to collaborate. Partners in this project include ClimAd Technology, TNO, Zuyd University of Applied Sciences, Eindhoven University of Technology, Hemubo, GSF Glasgroep, OMT Solutions, Timmermans Hardglas, Sekisui Europe, Ecomatters, Vlakglas Recycling Nederland, and de Alliantie. The SFEER circular window project has a four-year duration and will run from April 1, 2023 to March 31, 2027.

What will be delivered?

The SFEER circular window project will deliver the following results:

1)     A process to efficiently disassemble existing windows, clean the glass surface, characterise it and provide it with insulation coatings, in order to enable the reuse of glass plates;

2)     The development of a new thermochromic PVB film for laminating recycled glass to make safety glass, including circular design for recycling and reuse of the film;

3)     New photochromic and thermochromic retrofit window films, including circular design for recycling and reuse of the film.

All products developed within the SFEER circular window project are based on established technologies that have been proven on at least the laboratory scale and are now ready for scale-up and optimisation. These technologies will now be further developed to pilot scale with demonstration tests in a realistic environment.