Operating costs are greatly reduced compared to the larger conventional HVAC systems by using less fan energy and less refrigeration energy. Variable Air Volume Systems also cut initial cost by taking advantage of building diversity. System capacity is determined by the instantaneous peak demand of all zones in lieu of the peak demand for the entire building. The smaller components of a VAV system require less floor space and give the owner the flexibility to adapt to tenant changes as desired at any time during or after construction of the building. With today's energy conservation and efficiency requirements, Model Series 3000 air terminals are designed for and adaptable to any modern VAV requirements. The latest in control components and options provides maximum flexibility with a wide scope for cost effective innovation.