Could super-sized heat pumps make gas boilers extinct?
The cities turning to huge heat pumps to provide warmth to thousands of homes and businesses.
www.bbc.com
Interesting article about two district heating systems using geothermal heating.
Well, really hydrothermal, I guess.
One in the Northeast of England in Gateshead using water in old mines.
The other in London using heat from water in aquifers.
