Geothermal heat pumps, or ground source heat pumps (GSHP) have been around for more than half a century. The technology exploits the constant temperatures we find right below the Earth’s surface, either for heating or cooling purposes, and has significantly higher efficiency than electrical heating, furnaces or even air source he
aga. Nothing better than an AGA stove in a kitchen. I stayed at sporting estate in Scotland that had a large one like this and it heated the entire manor. Apparently, there is a type that also functions as a furnace as well.
Paper Mill - 15 This is a steam boiler. The top right at the stair end is the steam drum. The pipes coming down are the superheater tubes. Steam leaves the steam drum and then re-enters the furnace to be further heated