After reading several comments and view rankings of Rowenta-SO, I decided to buy it.
Upon receipt it worked !!
I put it in my room and a hot wind blowing directly. And it really heats up.
It has a silent mode and also a fresh breath. Frankly, fresh breath, I do not think to use it. I guess it's to avoid condensation.
By cons, really quiet mode reduces noise.
I'll try to put a video so that you can "hear" the difference.
He really fulfilled its mission to rapidly heat a small area.
I am fully satisfied.