We have a Bryant FC4CNF048 Air handler paired with a Bryant 663GJX042-A Compressor. The return air is downstairs dirctly under the air handler. It is the only return. Our master bedroom is upstairs at "the end of the run". It has a large window and cathedral ceiling. This room is the hottest in the house and gets the morning, afternoon and evening Central Florida sun. We have to run a fan constantly to circulate air. the heated square footage of the house is 2000 sf. There is not room for another return duct. The dealer wants to "baffle". We had all downstairs vents completely closed and could not increase the cooling in the master bedroom. I think baffles are an ineffective crutch, will raise static pressure and reduce efficiency. Does anyone have a suggestion on how we can resolve the problem. Would a larger duct to the master bedroom help?