I've just had a new WB greenstar 30CDi fitted, which I'm pleased with
in terms of operation.

There's just one part of the installation which I've noticed looks a
little odd to me - the flue on the outside appears to be ever so
slightly inclined upwards - probably no more than 5 degrees off
horizontal in truth.

Should I be concerned? Or is this the way it should be? I'm
imagining that some rainwater could come through there, but I also
imagine that the flue is designed to handle some condensation in there
so water ingress ought not to be a problem.

I will obviously get the bloke back if it isn't right, but he could
just tell me that's the way its supposed to be, and I'd not be able to
contradict him. So I'd like some guidance first if possible.

Many thanks!

Matt