How to troubleshoot HVAC airflow that doesn't meet standards

If HVAC airflow doesn't meet standards, don't just keep opening the dampers wider during commissioning. First, check the design airflow in the drawings, fan speed, filter status, flexible connections, and duct leakage, then check if the terminals are blocked by ceilings or furniture. Increasing one branch might cause others to drop, so you have to balance the system as a whole. The position of…