Having your HVAC system’s airflow balanced means heating and cooling airflow to every room into the house is consistent with the size of the room and balanced with the amount of air removed from of the room by the return airflow. This results in a condition of neutral air balance, considered optimum for effective and efficient heating. When airflow is out of balance, a range of performance and energy-efficiency shortfalls will affect your HVAC system, household comfort and indoor air quality.