VAV boxes provide cooling in harmony with heating coils, with both functions controlled by a single thermostat. In many systems, the VAV box minimum airflow is set at approximately twice the airflow required for ventilation. This unnecessary airflow increases energy consumption by requiring additional heating and cooling. This video explains the cause of the problem and outlines a practical solution.
The Perimeter’s Dirty Little Secret
Your thermostat kept the room perfect. Your heating valve had other plans. And nobody noticed — until the bill arrived.