Hot water and space heating


Onnelanpolku nursing home, which was built in 2013, is a so-called near zero energy building. To achieve this classification, the building needs to be well insulated and some of the consumed energy needs to be produced locally. A hybrid heating system for DHW and space heating was realized with the combination of solar thermal collectors and district heating.

Savosolar delivered 240 m² of collector area, which is used to cover 20–30% of the total thermal energy need of the building.

Collector area

240 m²

Collector type

Savo 200

Amount of collectors



Lahti, Finland

Installation year