Chord diffusers for thermal control

Hi all For credit compliance can ' Spigot damper with chord diffusers' be used for the rooms that are fed by a single FCU. The below are the details of the diffuser which will allow the occupant to adjust the air speed as required using the chord. FD Spigot Control Dampers to suit Waterloo Plenum Boxes / Neck Reducers Designed as a cost-effective, efficient way to adjust the airflow supplied through plenum boxes or neck reducers, the FD Flap Dampers can be fitted to any of our spigots - circular, rectangular or flat oval. They can be adjusted with a cord, fed through the air terminal device and ready for commissioning, or with an external quadrant accessible from outside the duct, allowing for the damper to be locked into position. The other alternative is to adopt plug in device at certain workstations for the credit compliance. Quick help will be much appreciated.