I have an older Shenandoah wood stove. I'm not sure what model it is but i saw a picture of an R77E and it looks just like that one. Mine has the pipe to the chimney in the rear and the top is where the duct work goes to tie into the gas furnace. I have no experience with wood stoves at all. I got this stove to supplement my gas furnace and i'm not sure exactly where to tie into the duct work? There is a thermostat for the stove but no blower. Does the furnace draw the heat up through the vents? Any help would be greatly appreciated.