really convenient! 6

Needing to reduce the flow of ventilation (and noise), I opted for this drive.
It is simple to use and implement, it is enough to insert the power plug.
This drive does not heat at all, and hardly makes any noise either. I have found no electrical disturbances that can beings caused by the voltage hash.
Result: my ventilation can be adjusted to the optimum speed, up to an inaudible speed.

This type of dimmer (dimmer) is not toujour the optimal solution for controlling the speed of a motor, but it is much less costly than a frequency inverter!
All engines do not always appreciate this type of drive, so it depends.
It is not frequent to use the entire range of the potentiometer adjustment, and we must find the minimum threshold where we hear the engine "do not like it" and always stay on top.
Once found the right tuning, it is happiness!