On Jan 9, 5:45*am, Andy Hall wrote:
On 2008-01-08 17:43:10 +0000, David Hansen
said:

On Tue, 8 Jan 2008 14:31:36 +0000 someone who may be Andy Hall
wrote this:-

Pipes over 2m high with about 50mm of insulation on them snaking around
the streets by the side of the road. * * The system is turned on on the
1st October, regardless of the weather, and the temperature inside the
buildings is regulated by opening the windows.

District heating is done better in a number of places. Iceland is
perhaps the best known.

They have big open air baths there but only because the heat comes
straight out of the ground

The warm water that is used in Reykjavík comes mostly from over 20 kms
away. In Akranes in west Iceland it is over 50 km distance from the
heating source.
The heat in Iceland never comes straight from the ground.