Rectangular Mechanical CAV Units
CMS
These are constant air volume control devices that operate by providing their own mechanical control. They do not require any electric actuators. They are used to provide constant air volume control with a deviation rate of ±10%. The air volume setting can be changed using an Allen key via the adjustment mechanism on the unit.
They have a wide operating range with air velocities between 2 and 10 m/s and pressures between 50 and 1000 Pa.
