We've moved into a 3000 sq. ft. new construction home. I'm disappointed in the heating system. The south side of the home is consistently 5 degrees colder than the rest of the home. The contractor installed a damper in one of the main trunks but it hasn't done anything to even out the temps or increase air flow to the cold rooms. I noticed that the colder rooms coincide with the unfinished parts of our downstairs. Two questions: 1) Can a blower be added to one of the trunk lines? 2) Will insulating the ceiling of the unfinished parts of our bottom floor help warm the rooms above?