Ran unit through heating test mode. Checked airflow through ductwork to supply registers in media room. Registers were getting airflow. Couldn't adjust any airflow due to no dampers. Ductwork has multiple splices in it and inner liner is exposed by water heater. Took pictures of duct run and attic space. Exterior walls to attic aren't insulated. Walls in media room were 46 degrees. Attic is vented. Lack of insulation will affect comfort in room. Room will get colder quicker than other areas upstairs and not catch up (temp) In regular operation. Can install dampers in start collars to adjust airflow and add more volume of air to media room.