Hi everyone! I have a project that the system works with outside air demand according to the CO2 sensor. The outside air falls through a shaft and comes in line with the opening of the damper (opening according CO2 sensor). What amount of air flow should indicate in IEQp1? The maximum flow passing through the damper? Thank you!

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Lawrence Lile

Chief Engineer

Lile Engineering, LLC

LEEDuser Basic Member

59 thumbs up

Wed, 10/29/2014 - 16:59

I believe that the maximum airflow would be the correct value to use. The CO2 sensor is designed to limit airflow when the space is unoccupied, and not needing any outside air. ASHRAE 62 vbentilation rates are based on maximum occupancy. The CO2 sensour is designed to sense maximum occupancy and turn on the outside air at that time, so it would make sense to analyze the peak airflow through the damper.

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