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World’s Largest Installation of Curved Electrochromic Glass Completed in Sweden
Swedish proptech company ChromoGenics has delivered the world’s largest installation of curved electrochromic glass to the new climate-certified headquarters of Sweden’s National Board of Housing, Building and Planning (Boverket) in Karlskrona.
The project combines advanced solar control with architectural freedom – reducing the building’s climate impact while enabling innovative design. Developed by Skanska and designed by leading architecture firm Sandell Sandberg for property owner Vacse, the building sets a new standard for sustainable offices of the future.
Where Design Meets Technology
The curved glass façade features large, rounded panels – a technical challenge in itself. ChromoGenics developed a tailored solution using its proprietary electrochromic technology, ConverLight®, integrated into specially engineered, curved glass cassettes.
"ConverLight® dynamically adapts to solar conditions, improving indoor comfort and energy efficiency – while preserving full architectural design freedom. Achieving this at scale with curved dynamic glass is a clear technological breakthrough,” says Fredrik Fränding, CEO of ChromoGenics."
A Model for Tomorrow's Sustainable Offices
The headquarters serves as a national pilot project with ambitious climate targets. Early life cycle analyses showed that facade glass represented a significant share of the building’s total embodied carbon. Instead of a planned double-skin facade, the project team chose a single-skin glazing system featuring ConverLight – reducing material use and emissions, while improving energy performance.The technology dynamically regulates light transmission, reducing cooling demand in summer while allowing beneficial daylight and solar heat during colder months.
Seamless Integration and Installation
The four-story building includes a distinct glass band on the third floor, reinforcing its curved architectural identity. Installation was carried out by UBA, subcontractor to Skanska, with ConverLight fully integrated into Schüco’s structural glazing system.
“Working with ConverLight was smooth and efficient. Each unit integrates seamlessly with the building’s control system, ensuring optimal solar regulation without complicating the installation,” says Fredrik Liliedahl, CEO of UBA.
Now Open – A Smart, Climate-Conscious Workplace
The building has now been handed over from Vacse to Boverket. It will accommodate more than 250 employees and stands as a showcase of how advanced glazing technologies can reduce climate impact, optimize occupant comfort, and support cutting-edge design in commercial buildings.
Learn more about the technology and project: www.converlight.com
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About ChromoGenics
ChromoGenics is a Swedish proptech company specializing in electrochromic glass solutions for energy-efficient and sustainable buildings.
With its proprietary foil-based technology, ConverLight®, ChromoGenics enables real-time control of solar heat and daylight – reducing energy consumption and improving indoor comfort.
The company manufactures its products in Uppsala, Sweden, with a strong focus on resource efficiency. ConverLight® is an ISO-certified electrochromic glass product with documented performance, designed to meet the demands of modern architecture and green building standards.
Through strategic partnerships with leading players in the glass and construction industries, ChromoGenics drives sustainability in the built environment.
ChromoGenics is owned by Färna Invest, a Swedish family-owned investment firm focused on long-term initiatives in energy, technology, and industrial development.
