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Outdoor Air Flow Rate Fraction Schedule

I am curious about the function of the "Outdoor Air Flow Rate Fraction Schedule" under "DesignSpecification:OutdoorAir" of space type. (I use OS 1.13)

The inputoutput reference file shows that this field will defines how outdoor air requirements change over time. However, I test a few models with different schedules but results didn't show any difference. What is the function of "Outdoor Air Flow Rate Fraction Schedule"? What output will it affect?

Outdoor Air Flow Rate Fraction Schedule

I am curious about the function of the "Outdoor Air Flow Rate Fraction Schedule" under "DesignSpecification:OutdoorAir" of space type. (I use OS 1.13)

The inputoutput reference file shows that this field will defines how outdoor air requirements change over time. However, I test a few models with different schedules but results didn't show any difference. What is the function of "Outdoor Air Flow Rate Fraction Schedule"? What output will it affect?