It is very quiet compared to its suction power. It is the third one I have bought. The oldest one I have has been running continuously in the bathroom with daily household use for 24 years without any problems. It is a bit tricky to install, necessary in the attic above the bathroom.

As a device fully silent and high quality. The air can be heard at the input inevitably, but with a sound trap you can't tell if it's working!

Excellent although without an additional sound trap at the input and output, the noise I measured was around 67db

It works daily, 12 hours a day, for 3 years now. It refreshes the air in a closed space of a pool-jacuzzi, meaning with a lot of humidity. Very satisfied