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[EnergyPlus_Support] Controller:OutdoorAir minimums



Dear Forum,

I'm trying to make sense of the I/O Reference description for two of the fields that affect the minimum OA. (shown below)

Can someone explain how these are different from each other?

Field: Minimum Outdoor Air Schedule Name
The name of a schedule whose values are decimal fractions (0.0 ? 1.0) that multiply the minimum outdoor air fraction. This schedule is useful for reducing the outdoor air flow rate to zero during unoccupied or start up hours. If this field is not input, the minimum outdoor air flow rate remains constant during the simulation period.

Field: Minimum Fraction of Outdoor Air Schedule Name
This is an optional field with the schedule values in decimal fractions (0.0-1.0). This field enables the user to limit the minimum amount of outdoor air permissible and thus also helps in getting at least the minimum amount of air in.



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