Thanks Woodbe.
Waterfurnace do have an interesting and detailed website - useful. I did not know about them but I had got data from several European and Canadian sources.
Geothermal seems to have a lot of advantages provided one can install the outside pipes for a reasonable cost, plus there is a risk in being a local pioneer.
Am still looking for more Australian information and suppliers so if anyone out there can help, then please do.
Thanks
Graeme
