"Andy Hall" wrote in message
...
On Wed, 5 Nov 2003 17:39:47 -0000, "Christian McArdle"
wrote:

Mine has a cylindrical heat exchanger like a drum with pipes inside
around the edge and the burner being a mesh affair at the centre. In
effect, the heat is exchanged radially from the burner at the centre.

Well that sounds like a reasonable burner arrangement too. I was under
the
impression that some boilers used the burner underneath method, where, in
a
condenser, it gets a nice shower of acid.

Christian.


Sure. I know that some of the older ones that had secondary heat
exchangers did.

Mine has a bottom mounted pre-mix burner and it's a condensing boiler. the
condensate occurs at the heat exchanger edges.


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