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# The housing association of six apartment buildings switched to renewable energy

Housing association As Oy Lehtisaari Salpa’s six apartment buildings were built in Helsinki’s Lehtisaari in the 1960s. The apartment building company located in Helsinki’s Lehtisaari switched from district heating to a hybrid system that utilizes renewable energy. The innovative system combining geothermal heat, heat recovery and solar electricity brings significant savings and self-sufficiency to As Oy Lehtisaari Salpa. The savings in heating costs are estimated to be more than 220,000 per year.

During the project, Paavo Viitamäki was the chairman of the board of the housing association. “We wanted to heat more efficiently with advanced geothermal technology and utilize the waste heat of the exhaust air,” he says.

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