LeaseGreen has implemented a complete modernisation of an energy system in a valuable property owned by the Åbo Akademi University Foundation close to Turku Cathedral. The Jokikortteli energy overhaul included the Sibelius Museum built in the 1960s and four properties from the 1800s built in the Empire Style: Domvillan and Åhuset built in 1831, Tryckerihuset from 1834, and Humanisticum, built in 1896.
“When you stand on Piispankatu and look around, most of the buildings belong to Åbo Akademi University Foundation,” explains Mika Soinio, the foundation’s property manager.
As part of the overhaul the ventilation, automation and lighting of the properties was modernised, resulting in a considerable reduction of energy use in the properties. Subsequently, district heating was changed to geothermal heating and radiant cooling.
The properties cover a combined area of 6 100 m2 and are heated by three 90-kilowatt heat pumps. The system’s output is roughly equivalent to the heat pumps of 30 houses.
“Cost savings are the most important aspect here. I tend to think that we are getting the cooling free of charge,” says Soinio.
According to LeaseGreen’s calculations, the return on investment is 9–12 per cent and the life-cycle savings are in the range of 1.8–2.5 million euro. The carbon footprint from heating the properties reduced by 87 per cent.