How long have they been there?  Likely they've set up brood rearing &
they'll be almost impossible to move without killing them, unless you
can reach them (i.e. dismantle the portion of the casing/chimney - or by
a bee-vacuum if you can reach there with an extension).
 
Last month I had a double-basketball size swarm take off on me after
hiving without a queen-excluder (dooooh) and they took up residence in a
nearby old tree-hive.  After emptying a 1/2pint of  Bee-Go into the
bottom of their hive & vacuuming them with my bee-vacuum out of the
upper exit.  This made them mad & that's all.....They would NOT exit the
hive - even though the smell was enough to almost knock me off the
ladder.
 
One possiblity:
If you can reach the hive, you might be able to get someone with a
bee-vacuum (i.e. low pressure & catches the bees in a box) to suck up
most of the bees.  If they can reach the queen, they'll succeed.
 
 
 
Lynn wrote:
 
> From: KENNETH A TREMBATH <[log in to unmask]>
>
> >We had a swarm of honey bees move into our chimney,the person who
> >owns them offered no help.It is steel with a wood 12"x12" caseing.
> >I tried to smoke them out with a mole bomb, no luck.Any ideas?
> >Thanks Ken
>
> Can anyone help this kind fellow out. Thanks