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1.Bathroom fan
2.Big air flow and quiet
3.Easy installation for wall;glass;ceiling
4.Several options for function:
Delay Timer(1-20min)
Hygro(Timer+Humidity sensor)
5.Automatic thermo-actuator for shutter open/close
6.bush bearing or ball bearing
7. long life and energy saving.
automatic thermo-actuator for shutter Bathroom Fans