Heat pumps are often talked about as a single technology type, but in practice, there are two main systems used in UK homes: air source and ground source. Both systems work on the same principle, ...

A neighborhood in Framingham is the location of the nation’s first utility-owned geothermal network. Thirty-six buildings, including single- and multifamily homes, the local housing authority and ...

A project underway in New Haven shows the potential of the system, which harnesses heat beneath the earth. But it's not suitable everywhere.