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Overpressure blinds made of aluminium
Characteristics:
- The overpressure blind is fitted directly over the wall where the fan is installed.
- Aperture by overpressure due to air flow.
- Closed when the fan is at rest.
- Made of aluminium sheet metal except for models 125 and 140, which are made of galvanised sheet steel.
- Maximum speed recommended 18m/sec. for 90, 100, 125 and 140 models.
