Upon diagnosis of upstairs system found that the problem with the airflow is that is the only duct that is split between two rooms all the other rooms are fed by a single duct so to even out the airflow up there it would be best to install another duct and feed the bedroom by itself and bathroom by its self. Upon opening system I found a lot of biological growth on coil in the cabinet and blower motor recommended IAQ 300 to help combat viruses in the house and to keep air quality good for the upstairs for the bedrooms. Happened to look at main system complementary and saw secondary drain pan full of water found primary drain clogged recommended a clear and treat the drain and to install a float switch in the primary drain. Also found biological growth in that system to pictures are as followed in the notes also recommended an IAQ 300 for that system. Filter sizes for the house are 20x25x4 and 20x20x4 Definitely recommending adding some ductwork upstairs and maybe tweaking a few of