single-duct system

single-duct system

An air-conditioning system in which one duct conveys air, at a given condition, for a number of different spaces.
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A single-duct system is adequate for distribution of dehumidified air;
Under some load conditions, the use of zone re-heaters also results in the single-duct system operating with the simultaneous cooling and heating of the supply air.
Therefore, it can be concluded that the performance of the synthesized systems should be at least equal to that of the single-duct system (Figure 1) and preferably equal to that of the conceptually optimum system configuration (Figure 3).
The dual-duct, variable-volume system has the same limitations as the single-duct system, but not to as great a degree.