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Situated in the historic industrial city of Porsgrunn in the county of Vestfold and Telemark, the new 11-story building marks a symbolic continuation of the district’s history as Telemark is home to a 19th-Century hydropower plant. Powerhouse Telemark indicates the area’s growing investment in the green economy. The south-east facing façade and roof of Powerhouse Telemark will generate 256,000 kWh each year, approximately 20 times the annual energy use of an average Norwegian household, and surplus energy will be sold back to the energy grid.çade panels that give the building a unified expression. Functioning just as a passive house, the building is super insulated and features triple isolated windows whatsapp number database throughout. The concrete slabs lend the building a density akin to that of a stone structure storing thermal heat during the day and slowly emitting heat during the evening. A low ex system with water loops in the border zones of each floor, assures the building is efficiently cooled and heated through geothermal wells dug 350 m below ground.