Hi Jim
On (27 Jan 98) Jim Dunmyer wrote to Alec Cameron...
 JD> Hot water heating boilers are very common in the US, Alec. They run at 
o
 JD> more than city water pressure, usually much less. I believe that they
 JD> incorporate a pressure regulator on the water feed line. They also
 JD> incorporate extensive controls to keep the temperature from ever 
ctually
 JD> boiling the water, only heating it. The 'radiators' are usually 
aseboard
 JD> units today.
"controllers" being less than perfect, I guess many installations have a
ventilated header tank so that the pressure is incapable of rising
excessively, even with max heating maintained.
 JD> Steam heat was common many years ago, again using low-pressure boilers.
I know that in northern Europe, some thermal power plants sell piped steam,
metered at each home, for District heating.
 JD> I've never seen a steam heat system in a modern home however.
The alternatives are so attractive. Like really bright jumpers!
Cheers........ALEC
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