Yes, I'm very interested in the fan issue as well.
As I've stated before, about 90% of the time I have been next to an Enertia V.1 the fan was running and it was a bit distracting and kind of flew in the face of one of the obvious advantages of an electric motor which is of course, lack of motor noise. However, maybe my experiences were just anomalies.
But having a fan that is on less or is quieter when it is on would be a welcome advancement to me.