Porintie-Ulvilantie | Helsinki

In addition to switching to geothermal heat, As Oy Porintie 9 and As Oy Ulvilantie 17a started to capture heat from the exhaust air, built a photovoltaic system and installed cabling for electric car charging points in all parking spaces. At the same time, the properties’ automation was modernised and connected to LeaseGreen’s Meta service.

As Oy Ulvilantie 17a and As Oy Porintie 9, built at the same time, form a close-knit unit, although they are separate housing companies. Therefore, they decided to carry out the energy renovation together. The companies have a total of 350 apartments, a common heating plant and a heating company.

“It was natural. Our district heating bill is over EUR 300 000 per year,” says Eetu Järvinen. He is Chairman of the Board of As Oy Ulvilantie 17a.

The housing association believed that the renovation would increase the attractiveness of already desirable apartments on the market. The fundamentals were good. The energy renovation halved the company’s heating costs and significantly reduced its renovation debt. The life-cycle savings amount to €4.9 million. The carbon footprint was reduced by 770 tonnes per year.

A total of 66 energy wells were drilled, with a total length of 27 kilometres. The solar power plants installed on the roofs of the buildings have a capacity of 60 kWp. About half of the electricity they generate is used to power the geothermal heating system and the rest is used to generate electricity for the property, for example for charging electric cars.

It is well known that decision-making in building societies is not always quick or easy. In Munkkivuori, the decision on energy renovation took more than two years in total. In the end, however, it was decided by a clear majority.

“The groundwork was done really well, so it was an easy decision to make. We have received a lot of positive feedback from residents,” says Järvinen.

“And it’s no wonder. There is no cost to the shareholders, it’s all financed by the savings on energy bills.”

Contents of an energy renovation

• Geothermal heat
• Exhaust air heat recovery
• Solar photovoltaic
• Electric car charging infrastructure
• Automation
• Intelligent steering
• Remote monitoring