[EnergyPlus_Support] Different from reality & Ventilation related problems

["abeermme" <abeermme@xxxxxxxxx>]

Hi,
I'm simulating an office space in a hot arid area, whose winter is 
cold so it's not a common practice to need cooling in cold months 
even in office buildings whose internal gains are high, (sometimes 
in few cases natural ventilation might be used when internal 
temperatures are relatively high) BUT so far, all results show 
considerable cooling loads in these months! I tried reducing internl 
gains, different space ratios and other options that might be 
relevant but still getting same results of cold months cooling.
- Thinking that the problem might be because of the use of natural 
ventilation as "scheduled", I tried setting it to b "calculate" but 
got an error message saying: [b][i]"**FATAL: 
GetAirFlowNetworkInput": Program terminates for perceding reason(s) 
Please check the EnergyPlus error file for more information"[/i][/b]
In energy plus err. file many severe errors appeared as follows:
[b][i]" ** Severe  ** GetAirflowNetworkInput: The number of 
AIRFLOWNETWORK:MULTIZONE:COMPONENT ZONE EXHAUST FAN is not equal to 
the number of Zone exhaust fans defined in CONTROLLED ZONE EQUIP 
CONFIGURATION
   **   ~~~   ** The number of AIRFLOWNETWORK:MULTIZONE:COMPONENT 
ZONE EXHAUST FAN is 0
   **   ~~~   ** The number of Zone exhaust fans defined in 
CONTROLLED ZONE EQUIP CONFIGURATION is 4
   ** Severe  ** GetAirflowNetworkInput: Zone Exhaust Fan is not 
defined in AIRFLOWNETWORK:MULTIZONE:COMPONENT ZONE EXHAUST FAN
   **   ~~~   ** Zone Air Exhaust Node in CONTROLLED ZONE EQUIP 
CONFIGURATION =5468 FAN COIL RETURN"[/i][/b]
Could you please help by giving probable reasons for the 1st topic 
and some solution to the second?
Your help is urgently needed and highly appreciated.
Thanks, regards
Abeer



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