CAV control principle, constant air volume
CAV is the simplest form of ventilation control.
CAV corresponds to a simple on/off timer, which can, for example, switch a unit on at 07:00 and turn it off again at at 17:00.
CAV is typically used when:
- The required level of ventilation is uniform
- - There is a low variation in loading from persons in the room
- - There is low variation in heat load
Example: Copy room, corridors and toilets
A timer and weekly plan control the activities of the ventilation system
Any timer can be overridden by a switch or motion sensor |
Cheap installation
Simple control |
Same airflow in every room, regardless of load
Higher energy consumption |