Dual Duct System
 Custom Search The dual duct system is a constant volume air system which supplies air in two separate runs of duct to various mixing boxes throughout the building. One air supply duct is called the hot deck and the other thecold deck, with take offs to each mixing box located in the ceiling space. Zone thermostats sensing the space temperature, operatea damper in the mixing box or boxes to regulate the temperature of the mixed air supplied through the diffusers to the area. The return air fan which draws air back from all the zones, provides the return link in the air circulation. The conditioned air supply system is comprised of the following components:
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