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In the case of Underfloor Air Distribution Systems (UFADs), the plenum itself is used as a ventilation and air-conditioning duct. Conditioned air is supplied into the room through vents in the floor or from small, floor-mounted diffusers. UFADs offer considerable benefits compared to traditional air-conditioners. Firstly, they are much more energy efficient as the air does not need to be cooled to the low temperatures of conventional air-conditioning systems which use overhead ductwork. Secondly, the plenum provides an easily accessible and extremely flexible space for power and communication cables. So, while using the UFADs, the insulation of the floor is very much important.
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