Horizontal Installations are generally a very good source for a ground source heat pump. There are however some disadvantages.

1.    Space, even with the use of slinky collectors a lot of space is required.
2.    Fear of hindering a gardens normal use as a installed area needs to be kept clear of intrusions i.e. paths and patios etc…
3.    Fear of frost heaves in some causes the ground to rise slightly.

Installation:
To install a horizontal installation a trench is usually excavated 1 m Wide by 1.5m deep, the length may be dependant on obstacles and amounts of trenches available. Ideally the ground here will be wet, saturated sands and gravels compromises can be made for ground conditions.

The collector pipes, will then be laid and backfilled to the contractor specifications and piped back to a manifold chamber where it will be piped back to the heat pump. The collectors will then be pressure tested, filled and leak tested.