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Refurbishing to Create Energy-Positive Buildings Solution by: Snøhetta, Skanska, ZERO, Sapa, Hydro, Asplan Viak, and Entra Eiendom

Powerhouse Kjørbo is the first office building to become energy-positive after refurbishment, producing more energy than it consumes over its lifetime.

The Triple Bottom Line

Environmental The building uses less energy while also producing clean and renewable energy for the electricity grid.

Social Improved lightning and ventilation contribute to a better indoor climate and working environment for building occupants.

Economic Higher upfront construction costs will be repaid over the building’s lifetime due to lower energy costs, making the building financially viable.

Developed: Norway

Deployed:  Norway

1 World Business Council for Sustainable Development. “Energy Efficiency in Buildings - Transforming the Market.” 2009.

By optimizing and combining existing technologies in new ways, the project partners behind Powerhouse Kjørbo have created a building that produces more energy than it consumes. The concept focuses on energy efficiency as well as energy self-sufficiency through local energy production. This is done by focusing on ventilation concepts, lightning technology, choice of materials, and energy supply. The solar panels on the building can produce electricity for use on site, or for delivery to the power grid, with capacity of over 200,000 kWh, or 41 kWh/m2 each year. As a result of these efforts, the Powerhouse Kjørbo was awarded BREEAM’s “Outstanding” certificate. Why a Sustainia100 solution? Buildings account for 40% of the world’s energy consumption. 1 The project partners behind Powerhouse Kjørbo are collaborating to design and construct buildings that produce more energy than they consume. These energy-positive buildings reduce energy consumption and operating costs, while surplus electricity generated by rooftop solar panels can be used for other purposes.

The stairs go through all floors of the building and work as a ventilation shaft, ensuring good ventilation and circulation of air in the building.

“We are showing that the private sector can  work together in a unique collaboration , using existing technology in new ways.” Klaus-Anders Nysteen, CEO, Entra Eiendom Photo: Ketil Jacobsen

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Sustainia100 2014