Patent ID: 6986386

Claim:
A ventilation and air-conditioning system for energy-efficient conditioning of independent fresh and recycled air streams, said system comprising: (a) a first intake for drawing in a volume of fresh air; (b) a second intake for drawing in a volume of recycled air; (c) a single-coil heat exchanger for conditioning the volume of fresh air in a first region and the volume of recycled air in a second region, thereby producing a supply of conditioned fresh air and a supply of conditioned recycled air, wherein said first region and said second region are separated by a barrier and wherein said single-coil heat exchanger defines a fluid path transporting heat exchange fluid from said first region to said second region through said barrier, and transporting said heat exchange fluid back through said barrier from said second region to said first region; (d) a first fan for moving said supply of conditioned fresh air downstream in a first duct; (e) a second fan for moving said supply of conditioned recycled air downstream in a second duct; (f) a mixing box connected downstream of said first duct and said second duct, said mixing box being an enclosure in which said supply of conditioned fresh air and said supply of conditioned recycled air may mix prior to being ventilated into a room or zone; and (g) a control system for sensing a zonal temperature and a zonal ventilation requirement and for regulating said supply of conditioned fresh air in accordance with said zonal ventilation requirement and for regulating said supply of conditioned recycled air in accordance with said zonal temperature.