DavidW1820 wrote:Thanks Butch:
I'm not sure they make what I want. Namely something inline with the flue that all the gas passes through and that really boosts it. In other words a fan like they use on wood gasification boilers that is right downstream of the fire and can take 500 - 600 degrees. The exhaustos come close but I don't want it on top of my chimney. I want it next to the chimney at its base. Those inline inducers are more like pushers and would not have the "oomph".
Maybe I'm the only one...but I disagree. This Tjernlund will do exactly what you want, and w/ a power failure you still have most of your 7" flue w/ some draft to remove the C.O.
Here's what I'm referring to:http://www.grainger.com/Grainger/TJERNLUND-Draft-Inducer-4C732?Pid=search
More "oomph" than you're giving it credit for...these are tried and true for what you're trying to do.
Sounds to me like what you have in mind would not be as good for drafting C.O.after a power failure as the Tjernlund. As stated previously...You will still have a lot of coal to draft off after a power failure.