Abstract
This chapter describes the zone control operations, the factors that influence zone choices, and economic considerations. A “zone” is a part of a building whose heating, ventilating, and air conditioning (HVAC) system is controlled by a single sensor, which is usually a thermostat. A zone may include spaces such as a row of offices whose temperature is controlled by one thermostat in one of the offices. The zone may be supplied by its own separate HVAC system, or the zone may be supplied from a central system that has a separate control for each zone. A thermostat controls the temperature at its location and it should be placed where it is most representative of the occupants' thermal experience. A thermostat is usually mounted on the wall and is designed to keep a constant temperature. In order to maintain a set point for the zone, the thermostat must be located away from temperature affecting sources such as drafts, windows, and equipment.
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