District water loop heat pumps also have that piping cost, but has significant efficiency benefits. Both in spring and winter when some homes might need heating while more sunny ones need cooling, as well as the ability to use lake, river, or ocean as the heat source in the middle of winter as compared to much colder air.
District water loop heat pumps also have that piping cost, but has significant efficiency benefits. Both in spring and winter when some homes might need heating while more sunny ones need cooling, as well as the ability to use lake, river, or ocean as the heat source in the middle of winter as compared to much colder air.
https://idronics.caleffi.com/article/8-water-loop-heat-pump-systems