The purpose of using a Variable Air Volume (VAV) system is to add controllability to a diversity of occupancies using only one air handling unit. A constant volume system is like what you have in your home, either off or on. If you apply a constant volume system to a space with multiple heating/cooling load profiles, someone will not be comfortable at different times of operation. The fundamental parts of a VAV system include:
- Air handling unit
- Primary ductwork
- Terminal unit
- The ductwork/air distribution...
