Product Guide

How to Control A Variable Speed Fan Using KNX


All Theben KNX dimmers have a specific mode for controlling 230V variable speed fans and ventilation units.


This requires changing the load selection to fan (soft switching deactivated) on the dimming response tab. This will reveal a parameter called start-up time which is a delay to ensure the fan is at 100% speed before reducing to the required level.


Controlling a Fan with KNX
The parameters needed to control a fan



This is a simple way to integrate traditional fans or modern whole house ventilation systems into a KNX project.