Customer has thermostat set to 66 reading 66 in house. Delta t of 20 degrees. All vents open upstairs all have airflow. Advised possibility of smart thermostat with room sensors. Or mini split system to provide comfortability upstairs. Downstairs customer stated sweating ductwork. Ran system for roughly 45 min. No sweat collecting on ductwork. 2’ section of chase cut out showing ductwork. Only showing water damage at that location. no sign of water marks on ductwork. To left or right of location in question. No signs of water coming from around ductwork. Informed customer insulation could possibly take care of sweating ductwork. No definite answer to water damage coming from ductwork