Not totally convinced about the idea of compact ground loops close to the building, this goes against everything i was told on the Worcester Bosch GSHP installers course.
They are against the idea of slinky ground loops, we were told the loops effectively short themselves out and greatly reduce to performance compared to straight runs.
They also claim that the slinky coils rub against each other with ground movement and are prone to leaking.
The return of the ground loop should be at least 1m from the flow or insulated to prevent collected heat leaking back to the colder flow.
Any part of the ground loop within 2m of the foundations of a building should be insulated so it can,t freeze and crack the foundations.
The Worcester Bosch heat pumps are rebadged IVT ones and this info is mostly also in IVT's manuals.
IVT are a Swedish company that have been selling GSHP for 30+ years so I would imagine they know what works by now.
Steve
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