Got a question for the HVAC guys. Brought my 28-3500 with me to the new house. It worked wonders in my old raised ranch with ductwork built just for the stove. The new house is a 2 story colonial. House has existing oil/central air with 2 zones. Since I want to avoid any issues with the AC coil in the furnace plenum I'm going to tee off my 28-3500 and run a 8" feed to main trunk that feeds the 2nd floor and a 8" feed to the main trunk that feeds the 1st floor. Going to put dampers on both these runs. Stove will be the main source of heat 99% of the time. Should I put backflow dampers or manual dampers? I am going to have to run the furnace blower at the same time to help distribute heat to the 2nd floor. Is it possible to use a backflow damper in this situation or will the furnace blower be fighting the stove blower and push the backflow damper closed?