With a CAV system, a constant volume of conditioned air is supplied to all parts of the building, when the system is in operation, by providing air to each VAV unit with variable static pressure. The VAV damper modulates in response to variable static pressure to deliver a constant air volume Vconst. to the conditioned zone by the setpoint value within the limits of Vmin to Vmax.
The main difference between a VAV and CAV is that:
Variable air volume (VAV), the temperature of the air supplied remains constant, but the volume varies.
In Constant air volume (CAV), the volume of air supply remains constant, but the temperature varies.
- Airflow capacities from the full shut off Zone to 1500 IPs in low [min 100pa to 600 pa], medium pressure system [min 100pa to 1000 pa] & 2250 IPs for a high-pressure system, [min 100 pa to 3000 pa]
- Electric damper control- modulating, on off, DDC etc.
- Low-pressure drop
- Low sound levels
- Low leakage damper design
- Thermally and acoustically insulated casing
- Pressure sensor Grid- for average velocity measurement.
- Efficient actuator and controller with setpoint Vmax, Vmin.
- Suitability for DDC controller, LAN, MPBUS system