boubka wrote:In fact, I already have an air / air heat pump brand amzair on a radiator system (old circuit recovery) and soon on heated floor on my enlargement of 100 m2).
if you already had this well the air / air choice is pretty much zero
Another "bogus" remark from you ...
A water-to-water cap required at least 3 m3 / H ...
He must insure the well ....
Even more, if sand is present
Death of the exchanger guaranteed.
And it is necessary in France , a second well to reinject the waste water
So drilling ...