Tower in Ontario becomes world’s tallest retrofitted Passivhaus structure

ERA Architects has refurbished a postwar social housing building in Hamilton, Ontario, making it the largest residential building in the world to achieve Passivhaus EnerPHit certification. ERA used the North American elaboration on European Passivhaus standards for energy efficiency to retrofit the Ken Soble Tower, an 18-storey apartment building constructed in 1967. The firm also added
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