[EnergyPlus_Support] which items is useful in weather data for hvac ?

["yhleifei" <yhleifei@xxxxxxxxxxxx>]

Dear Energy Plus Team: 
    In epw file, there are 26 items. It is difficult to fill each items 
without error. In fact no all items be used for HVAC simulation 
calculation , such as "Global Horizontal Radiation {Wh/m2}". Some items 
have correlation each other , such as "Dew Point Temperature {C}" 
and "Relative Humidity {%}". 
    Which items will be used for cooling/heating load calculation ? For 
hvac energy consumption calculation ?  For lighting energy consumption 
calculation ?
Regards
Lei Fei



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