Thank you for the ZoneCrossMixing hint.However I am still baffled. I
have a large InternalMass. All is ok when the mass is in the primary
zone, but it is not used when moved to the cross mixed zone, in spite of
a overly large air flow rate.
Thanks,
Paul
 ZoneCrossMixing,
   XMixng 1,               !- Name
   Basement,               !- Source Zone Name
   ZONE MIXING SCHD,       !- Schedule Name
   flow/zone,              !- Design Flow Rate Calculation Method
   100.5,                    !- Design Flow Rate {m3/s}
   ,                       !- Flow Rate per Zone Floor Area {m3/s-m2}
   ,                       !- Flow Rate per Person {m3/s-person}
   ,                       !- Air Changes per Hour {1/hr}
   ZONE ONE,               !- Zone Name
   0.0;                    !- Delta Temperature {deltaC}
 Schedule:Compact,
   ZONE MIXING SCHD,       !- Name
   Fraction,               !- Schedule Type Limits Name
   Through: 12/31,         !- Field 1
   For: AllDays,           !- Field 2
   Until: 24:00,1.0;       !- Field 14
--James V Dirkes II, CEO / President
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