I have an HVAC system that will use a DOAS unit to supply neutral temperature air in a humid climate (climate zone 2).  The proposed DOAS unit utilizes a dessicant wheel with reactivation air.  Do the reactivation air and reactivation fan need to be explicitly modeled and included?  If so, how?  I'm using Trane Trace 700 and there is really no acknowledgment of such a thing- just heating or reheat.  The main cooling/heating is via hydronic air handler (chilled and hot water).