Function
The EFC35S control has a knob with which the chimney fans can be switched on and off, and the chimney draft can be adjusted to the desired level. The further the knob is rotated to the right after it has passed the on/off point, the slower the chimney fan.
A repair switch REP-AFB or equivalent must be attached to the chimney for the EFC35S control.
Note that the EFC35S must be installed by an authorized electrician.