Extremely quiet 1

My main criterion for selection of a fan was silent: I did not want to have an effective cooling at the expense of hearing the sound of a lawn mower permanently.
Researching the internet, I found this reference and I confess to being amazed: it is almost inaudible turning background.

Most:
- 2 mounting options are available: rigid with said fixing screws, quick fastening with anti vibration rubber fasteners and a kind of nail to secure. I do not think I'll often disassemble my fans, so I opted rigid attachment.
- Quality of the material: the power cable, the fan is very good quality.
- A voltage adapter for fan is also provided.

The least:
- For the rigid attachment (with screws), the end piece to attach to the fan is not threaded in advance. I strongly advise you to prepare the empty before placing the final because you may get the fan nozzle.

I can only recommend. One of the references fan 12 cm.