wrote in message
ups.com...
Actually, I did it by watching the draft, as I was just trying to get a
'safe' working solution.

With the powervent, too much combustion air and it would come out the
damper door (bad, bad, bad!), too little and it would soot up. I
basically split the difference between the 'soot' setting and the 'blow
out the damper' setting, erring a little towards the sooty side.


Power vent??!!

Gawd I hate those. Necessary evil, I guess...