As the price of electricity has risen significantly, many owners of country houses and cottages are thinking about saving. One possibility is, for example, switching off geothermal heating. However, many are unaware that the system needs to be prepared for this. If the system is filled with heat transfer fluid with a freezing point below -10 ° C, it may freeze during shutdown and cause serious damage.
To avoid this problem, ethylene glycol or propylene glycol concentrate must be added to the system. In this way, it is possible to lower the freezing temperature to -36 ° C, for example, which eliminates freezing and allows the heating system to be restarted without any problems when electricity prices return to normal.