Thank you for the reply, I like the suggestion of trying a test set up first but from reading all the replies, especially the last one showing the Harmon retrofit, I think I have enough info to go ahead and perform the surgery. The next best thing I could hope for is that someone has identified parts and a source that would bolt up the connection directly to the stove. It looks like I will have to custom make some components or get them made. thank you again for your input,
Uglysquirrel wrote:Isolation between a convection fan and the metal housing is quite a challenge with resonate frequencies and all, the fan in the basement does hold some promise though there can be a small delta p between floors,,,a big deal ? likely not. I would not put the combustion fan anywhere else but its OEM placement due pressure drops, etc since the amt of air going into the plenum under the grate is pretty important.
Personally I would first get some aluminized clothes dryer flex duct and aluminum tape and jury rig the convection blower a few feet from the stove to see how it sounds though that would be a very temporary test, not permanent at all. Placing the air inlet in a direction away from the large room area also may help. Just understand that any type of pipe causes a pressure drop and cfm loss, the longer, the worse it gets.