BTP EC series fans are used in ventilation systems that require relatively high compression, strong air stream and low noise. They are an excellent solution for ventilation installations in residential buildings, collective housing and public utility buildings.
Dedicated for ventilation ducts with the following diameters in mm: 125, 150/160, 200 and 250 mm.
BZZ backflow prevention device
The BZZ damper prevents uncontrolled air flow in the opposite direction when the ventilation system is switched off.
The BZZ backflow prevention device is designed to automatically close the cross-section of circular ventilation ducts and prevents uncontrolled reverse air flow when the ventilation system is switched off. The blades of the non-return flap open under the pressure caused by the air flow and are closed by return springs.
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