When you give thought to Ground Source & Geothermal Heat Pumps, you think about significant ground temperatures that may deliver incredibly successful performance.
Closed Loop Borehole
Flow/return pipes working down/up inside a single borehole to depths of 150m + (multiple boreholes inside a system array).
Horizontal Collector
Pipes under the ground at circa 1200 to 1500mm deep run horizontally, with the majority of the thermal collection being solar/surface heat derived because of the shallow collector depth (valuable ground temperature begins at 15m depth).
Open Loop Borehole
Good levels of more info Heat Pump efficiency are achieved a result of the trustworthy temperatures that can be delivered from aquifer units.
Here, a flow borehole as well as a separate return borehole circulate ground/aquifer water to the Heat Pump.
All 3 methods offer application advantages to suitable projects and can be configured as primary ground source collector-driven heat pump systems, or air/ground dual-source systems to lower civil charges where expected.