I have Furutech Destat fan which works very well and better than Zerostat as far as ease of use is concerned. Although static is not much of a problem where I live in general.
EBM, since you have both Demag ad Destat, do you notice much difference between the two units?
Over here, Acoustic Revive also has something similar and price roughly the same. It does look different but I was told it is the same OEM product internally just the outside parts that look different!