Very quiet.  Not very much airflow.
923210
Not as many cfms that I need, though very quiet.  Wasn't happy that I saw the adapter to boost the speed after I oredered. Guess it's my fault.
4488409
Nice fans, but does not push the amount of air I was hoping it would for a  5 6 inch fan.
1683555
While I do like this fan, I wish it was a little more quiet. It's not loud but it does make the noise a fan noise. It does push A LOT of air considering how small of a foot print it uses. The optional Oscillating feature is awesome as well.
1256793
The lowest setting on the fan is barely audible.  The medium and high settings aren't bad.  Seems to work well and I've noticed a difference in my sleep.
4689528
Not very quiet. Says that it will compress when writing to make it quieter. Doesn't seem to do that. Works well otherwise.
3266220
Very quiet.  I have not gotten to use it much, but it is quiet..  Sometimes I wonder if it is the fan or my computer fan that is going.  Very stylish, too.
2036774
Pretty quiet. Not sure what other reviews were talking about, but it does not blow cold air. Still, a good fan that doesn't take up a lot of room.
4621240
not very noisy, noticeable but not horridly so. Mostly unobtrusive, but not a powerhouse.  Good for minor cooling.
4614019
It's not bad. The most immediately noticeable con is that it doesn't provide much air flow. It feels like a car air vent on the lowest setting. For some, that small breeze might be enough, but I was hoping for more (and there's no setting to adjust the speed).

Still giving it 4/5 because it's surprisingly VERY quiet. This would make it ideal for an office job if it's mostly quiet in the building, so this fan would add zero background noise and wouldn't annoy anyone
750973
I purchased this item for my baby's room. The low setting is very quiet, but it used very little water from the reservior in a 10-12 hour period, which indicates very little water went into the air. I thought more moisture would have went into the air in that time frame. My daughter seemed to get some relief, but it took several days. I guess I expected more, but I have never used a cool-mist machine before.
3124512
This air purifier seems to do the job well enough and above all is very quiet.  Because it is quiet and relatively small it doesn't circulate enough air to handle large rooms effectively but t is perfect for smaller rooms.  The controls are touch and are easy to use.

There is an air quality indicator that works somewhat. It had some glitchy behavior so I'm not altogether convinced of its accuracy.

Overall, this is a good choice for smaller rooms, especially if quiet operation is desired.
3181521
does push a lot of air and it is not loud.  I have it in my bedroom and its no more noise than an AC
3703663
very quiet and powerful for the size.  yes the fan runs after use to cool the inverter,  but you can barely hear it.
2712020
There are very quiet.  build quality could stand to be a bit better.
1281696
Small and quiet. Circulates nicely. Wouldn't do much in a room over 12x12, but is working well in my daughter's room (10x10) that doesn't have an overhead fan.
4033719
I wanted a tiny dehumidifier for our small bathroom. This little machine operates quietly on a shelf and is barely heard. In fact it's so quiet I had to check to be sure t was taking in moisture.
3126461
It's quiet. The quietest fan in my rig, even when I crank it all the way up. The rubber on the corners seems a bit unnecessary, but whatever. It's a dope fan, still zero problems all this time later.