Came out because the customer was concerned about airflow in home. After fully diagnosing the system we found that the current ductwork is inadequate. We found that the system only had two returns, one located in the hallway and one pulling fresh air from outside the house. We went into the attic and found that none of the return ducts for the bedrooms were attached to the system. We also found that the master suite had no return. Two of the rooms had very long duct runs and weren’t getting any airflow. We also found that the upstairs thermostat shared the same wall with the air-handler so it would satisfy well before the rooms and would need to be relocated. Ultimately we will need to redo the entire ductwork for the upstairs.