I have recently installed an outdoor wood boiler and I am in the process of retrofitting my gas furnace to install the heat exchanger in the plenum to utilize my furnaces blower and ductwork to move the heat in my home. What is the thoughts on installing this exchanger in my existing furnace? It seams like every person in the industry has a different opinion on if this can or cannot be done. My gas furnace is a 90% efficient unit and has an AC A-coil in it. Some say I cannot put this wood heat exchanger in and move enough air with the other coils in the same plenum. They say I need to install a seperate air handler cabinet and tie into my duct work? While others have told me they have seen "hundreds" of this same setup done with no problems. Any thoughts or experience with this arrangement?