Most of this fan is the low noise. The quietest fan I found. We must tighten. I have 3 and there can be a noise with oscillation that can interfere in a room, but inaudible in a salon. Of the 3, I have one that really does not make much noise = the one there in the room. I also have a modeled 40 cm (living under the roof, long live ventilos) of this brand that can speed 1 also noise. The 50 db or 55 db are max speed and the oscillation is no noise. Coté quality and quantity of air brewed, it's all good. 1 fan date of 3 years and no problems.
