Borehole
We use both traditional boreholes and thermal probes.
A borehole involves drilling and extracting soil rock and water down to depths of as much as 100m. Into the hole a loop of special pipes is inserted. These contain a special refrigerant which gathers heat from the surrounding rock and soil and takes it back to the heat pump.
The depth, number and cost of any boreholes is governed by factors such as the heat conductivity of the ground, hardness of the rock, and size of heat pump.
A thermal probe is much like a borehole but rather than extracting soil, water and rock, a probe is pushed into the ground to depths of up to 40m. The probe, like a borehole, contains the same pipe work and refrigerant. In general more probes are required than boreholes.
Both thermal probes and boreholes are "closed loop systems", this means that no liquid enters or leaves the pipe work so leading to minimal maintenance.
All our installations are pressure tested to ensure their integrity.
