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Single Duct, CAV has a central fan room which conditions the air and distributes it. A constant volume of conditioned air is fed to the space. A Master thermostat controls the temperature of the air generated in the fan room.

This system suits large, open spaces with uniform loads and few windows. For example, lobbies, theatres, department stores and exhibition halls.

It is easy to maintain and offers good IAQ control, but offers no individual control (one zone only). It can be a packaged system.