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I am involved in a complex restoration project in Venice, Italy (a side hobby); and I am trying to figure out what would be the best option in regards to heat pump, potentially using geothermal energy from underground.

In Venice you have the option to do air/water heat exchange, using the water from the canals.

Any of you have any experience with something like that?

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Ask someone local.

What's available and rules vary really widely city to city.

What makes sense financially also depends on your building construction, climate and fuel prices, which also depends a lot on location.

I was asking more about the technical aspects. Regulation, etc I will need to deal with but it is pretty much sorted. Thanks.

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