I just used the VU/VF266x Turbo Silence Extreme last night for the first time. It works great except when the oscillation knob is in the fixed position, there is a residual noise that is forthcoming which distracts from the 35 decibel noise feature. This does not happen when the fan is oscillating from left to right. I hope this is not a design feature flaw. Overall it is a great silent fan. I hope someone from Rowenta will contact me about my issue.