Ground heat is absorbed using buried loops, a system of plastic coils (cross-linked polyethylene) containing a mixture of water + antifreeze solution.
Three collector systems are available for all kind of external ground areas.
- The traditional horizontal collector will cover, depending of the climatic conditions, an area of 120 up to 150% of the floor surface area. The collector loops are buried 60 – 100cm below the ground.
- Vertical probe in case of very small or steeply sloping areas. Probe length could reach a 100m, even more.
- Ground water installations for small or sloping external areas. Underground water is taken from relatively shallow water reservoirs at a depth of 10 to 20 meters.
A hydraulic distribtution circuit transfers the useful heat into the house via a underfloor heating, radiatiors (maximum temperature of 47°C) or any other solution that uses hot water to transmit heat.
