Ive heard that the slinky coil design can create problems with ground freeze?
It is well documented that slinky coil design ground collectors or compact collectors can cause problems with ground freeze. Because the energy extracted by the coils is taken from a relatively small area, radiant energy from the sun can’t keep up with the heat transfer into the pipes, so slowly the ground around the coils will loose heat that it cannot regain. It has been seen in some circumstances that the ground completely freezes over in the areas of the coil. We will only install horizontal ground collectors (including open loop) or bore hole type designs.
