BZZ backflow prevention device
The BZZ damper prevents uncontrolled air flow in the opposite direction when the ventilation system is switched off.
Brookvent
Ventilation Systems | Energy Saving Ventilation | Brookvent
BZZ backflow prevention device
The BZZ damper prevents uncontrolled air flow in the opposite direction when the ventilation system is switched off.
CAR backflow prevention device
A CAR, airtight backflow prevention device, is used in ventilation systems fitted for round ventilation ducts. It prevents the so-called air backflow and protects rooms against cooling in the winter.