Boverket

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.

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.

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.

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.

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.