This controller is for use with the Vitro automatic window / wall fans and the Built
In automatic flush mounting wall fans.
The unit will control only the 230mm (9A) and 300mm (12A) Vitro range and both models of the Built In range as these two models are only available in the automatic version.
The controller has an illuminated on / off switch and provision for reversing the rotation of the fan. This allows for the fan to act as a supply or extract unit. Airflow in the extract mode, which is the standard mode, is about 20 per cent more than in the intake mode. This is because of the design of the impeller.
The controller has five stepped speeds and off.