The heating and cooling of the whole building are provided by the roof top air handling unit (AHU-1). The unit consists of filters, a tri-coil system, a desiccant enthalpy recovery wheel, supply and exhaust fan, water source heat pump, mixing and recirculating box. The AHU can provide 2400-12400 cfm supply air depend on building loads and ventilation demand. With tri-coil system and enthalpy recovery wheel, the unit can go full economizer when the outdoor condition is allowed.

Supply fan and Exhaust fan module