Cob cob oven -flu or no flu (fwd)

[Shannon C. Dealy]

---------- Forwarded message ----------
Date: Thu, 13 Nov 1997 05:58:17 -0800
From: Rene Eisner <eisner at planet.net.au>
To: cob <majordomo at deatech.com>
Subject: cob oven -flu or no flu

Gday to all from down under..
I have just started the base for my cob oven. I have designed rather a large and 
elaborate oven with the base being built out of blue stone.
The cob dome itself will be a diameter of 1400mm.
My question to all is should i put a Flu(chimney) and if so where how etc...
Looking forward to hearing some ideas..
Thanks 
Brendon..