"David Hansen" wrote in message
...
On Sun, 14 Oct 2007 22:47:56 GMT someone who may be John Stumbles
wrote this:-

Correct me if I'm wrong Mary but you seem to be suggesting that (a) you
don't need an extra coil for solar heating if you have a boiler

Mary was responding to a posting which appeared to claim that a new
hot water cylinder would be needed for solar water heating. Whether
one is needed or not depends on the precise situation.

Also, for the solar system we have no secondary coil is needed.

Mary