Hello to everyone,
this is my first post here although I follow this idea and similar forums.
Regarding isolation, do not forget to underground pipes draws heat from the earth at a depth below about 1.5 m, while all that is shallower than that is above the "frost line".
This means that theoretically you should insulate pipes to a depth of 1.5 m, but in practice I think that is enough to isolate less, likely to 1m depth max. Of course, all parts of the pipes that come from the soil should be well insulated, and separated each one of other.
For this purpose, Styrofoam or similar can be used ...
|