its only 2 meters underground about..
I have heard of this one, my friend has it in his house in Lithuania, except in the pond.
He tells me there is another type, that you drill a very deep hole 3km down, he is thinking of getting this also.
'Niekonwencjonalne źródła energii' and section was 'Wykorzystanie energii geotermalnej ziemi'.
I will get someone to look into it for me.
all system is not to expensive..
It cost my friend 40,000 Litas (which is about the same as Zloty now) and he says it will pay off in 9 years.
He did not get any money from the E.U. or anybody else.