I have installed the fan in the ventilation shaft of my windowless bathroom and am very satisfied how well it works. After 10 minutes, the air exchange is finished and the mirror after a shower no longer fogged. The fan makes just normal noise due to the air flow. That was to be expected and I do not understand how some in the Forum get excited about here. It runs otherwise totally quiet, nothing rattles. Only the built-in timer does not switch off, it continues until you turn off the power. But it does not matter, I let him anyway running down my home-built control with timer, no problem. If anyone is interested has at the circuit diagram for reverse engineering, just ask. The fan is super processed and I am very satisfied.
