Energy efficiency and life cycle philosophy form an important part of today's building development.
Järvenpää's zero energy project, Jampankivi Palvelupiha (Jampankivi nursing facility), consists of two renovated houses and a new building. The builder, Järvenpään Mestariasunnot Oy, has directed its efforts to energy-efficient construction. The new nursing home built in 2011 was constructed in accordance with the building regulations coming into effect in 2020. On an annual level, the renewable energy that is produced by the zero energy building and can be transmitted to energy networks equals the amount of non-renewable energy that the building consumes. For this, the building must have a tight and thermally well-insulated shell, energy-efficient doors and windows as well as an efficient mechanical ventilation system with a heat recovery system. The building can use for example solar or geothermal energy as renewable sources of energy.
Means to promote innovations
- The implementation combined several technical solutions: Heating in the building can be managed with two vertical boreholes, which are used for cooling the residences during summer, and with solar energy. Solar energy is used for heating domestic hot water and for heating the floors. Electricity for the property is produced with solar panels and by making use of the elevator's braking energy. The ventilation system in the building utilises approximately 80 percent of the thermal energy for reheating.
- During the design stage of the project, efforts were directed towards cooperation with the researchers in the field, technology companies, material suppliers, designers and subcontractors in order to come up with the best comprehensive solutions for life cycle costs.
- The project investigated, in particular, the effects of the zero energy building on maintenance costs.
Benefits for different groups (users, buyer, supplier companies)
- The project has provided references for the suppliers of product parts targeting multi-storey zero energy buildings.
- The building costs of a zero energy building are about 15 percent more than those of a normal building, but it is estimated that this extra cost can be recovered in about ten year's time thanks to inexpensive maintenance costs.
- The additional electricity and heat produced by the building provide further benefits in that they can be calculated as deductions from the building's own consumption of electricity.