Pentti and Birgit Ristmeri live in a 170-square-meter detached house, but they only paid 180 euros for electricity last year. The finely tuned control system has not required large investments, and the same ideas can be implemented by any user of exchange electricity.
Nummelan Huhdanmäki in Vihti it’s snowing on a weekday afternoon in January and it’s five degrees below zero outside.
However, upon entering the dim entrance hall of the couple’s detached house in Ristmer, it immediately gets pleasantly warm. The temperature in the living areas is adjusted to around 22 degrees.
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