the credit language requires: "An alarm must indicate when the outdoor airflow value varies by 15% or more from the outdoor airflow setpoint." In the course of a coordination with the HVAC engineer the question occurred which setpoint should be used. A current one based on the current usage or a minimal setpoint for the project?

Planned is a VAV System with 100% outdoor air, where the airflow is regulated via CO2 sensors in the office/occupied spaces.

Additionally, the HVAC engineer asked if the via CO2 regulated airflow in a 100% outdoor air system isn´t already enough monitoring?

Maybe you can helo me out. Thanks in advance!