Pentti and Birgit Ristmeri live in a 170 square meter detached house, but they only paid 180 euros for electricity last year. The optimally tuned control system has not required large investments, and the same ideas can be implemented by any user of exchange electricity.
Pentti Ristmeri from Nummela has managed to reduce the use of purchased electricity in a large detached house to a very low level with the help of solar panels and a few inexpensive devices.
NIn Huhdanmäki in Vihti, on a weekday afternoon in January, it’s snowing and it’s five degrees below zero outside.
However, as soon as you step into the dark entrance hall of the couple’s detached house in Ristmer, you feel pleasantly warm. The temperature in the living areas is adjusted to around 22 degrees.