In article ,
GB writes:
Our boiler flue slopes downwards, so most of the condensate runs out
that way. This is the result:

http://tinypic.com/m/k2k6k6/2

I recall a post here when domestic condensing boilers first appeared,
where the condensate pipe dripped onto a conservatory roof.
The roof didn't survive the 4' icicle which broke away and smashed
through it.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]