Hello! We are working on a project that is going to install a constant volume system. To comply with the Minimum Indoor Air Quality Performance Prerequisite we have asked the HVAC designer to install an airflow measuring device. He is proposing an Chevron Airflow Indicator which is mainly used to monitor static pressure on exhaust ducts but we are not sure if this device will satisfy the credit requirements. Has anyone used this device to comply with the prerequisite?