I have a 3200 sqft house with a 117k BTU furnace. The 3 kids bedrooms are at the ends of the trunk line (usually with 9-10 branches before them) and always seem to be 1-3 degrees colder then the thermostat. This 1-3 degree difference was only achieved by closing almost ALL of the dampers 1/2 way. My concern is that I have too many of the dampers closed off too much and was concerned that I would be hurting the system. My thought was to add a duct booster fan to the baby's room (and possibly the other 2 kids rooms) so that I could open up the other dampers more. At the very least, I want the baby's room to be the same temperature as the main living area.
Any thoughts?