Title: Brukermanual for Refra varmepumpe.pdf
© UAB „Refra“ S. Dariaus ir S. Gireno g. 179, LT- 02189 Vilnius, Lithuania, Tel. +370 52031020 info@refra.eu www.refra.euUSER MANUALOpen SystemGround llop A ground loop is a heat exchanger that either extracts or adds heat to the ground. The ground itself is not a perfect heat sink/source because the energy added to the ground by the loop can change its temperature over time.