Constant Volume Regulators (CVRs) limit airflow to a maximum value across its effective range. They are used for both supply and return applications when the designer wants a consistent volume of air to be added or removed from the space. Toilet and kitchen exhaust, Outside Air, and Makeup air are all common applications.
CVRF2 has been designed as a register wall enclosure to accommodate the CVR. It is 2″ deep and will accept most register grilles.