I have installed it in a gym. On the first level, with good ventilation, it covers us perfectly. I preferred to get something powerful in watts and with a large diameter, and to work at a relaxed pace rather than something smaller and working at the limits. On the second level, I have only used it for 40s. In terms of distance, on the first level, you can comfortably feel the air at 12 meters. The intensity is much more noticeable on the second and third levels.
As for the sound, levels 1 and 2 are normal, but on the third level, it is audible, although it covers more than 20 meters, so if you are there, you don't hear it.
In terms of construction, it was the third reason why I bought it. It is entirely made of metal. I didn't want anything less since it went to a professional space.
I intentionally preferred something manual because if it has many electronics and a low price, it will also have slightly lower quality. So I preferred the traditional way of use, and I have peace of mind