A few more background notes...my pocono is in the basement, but i have some vents going up to 2 exclusive registers for my upstairs....i also have a fuel furnace hot air unit which goes to the others registers, no registers are shared...the fuel furnace doesnt seem to kick in since i got the coal stove installed. Also please note that the pic below of the stove in order to show you the vents, was taken in the fall before the stove was running. all the cables/wires are set up right and theres no stuff around the stove anymore. My coaltrol is set up upstairs by the living room
One thing I notice is the apparent absence of fire dampers as the ducts penetrate the upper floor.
The National Fire Protection Code (not used in all states) requires automatic fire dampers whenever a duct passes through a floor. Ducting for furnaces with an automatic quick acting cut off at 165F are exempt.
Check your local codes and inspection requirements or you may find you have no fire insurance.