- In most extract fans the vibration is transmitted to the surrounding areas while in SILENT extractor fans the vibrations are absorbed by acoustic mounting blocks.
- Backdraft shutter
- Ball bearings
| - Model provided with a PIR (passive infra-red) detector.
The unit starts automatically when a movement is detected within a maximum distance of 4 meters from the fan. - Also fitted with an adjustable run on timer, from 1 to 30 minutes, to allow the fan continues operating after the initiation of the movement detection.
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