Product review (2 stars): 500 CFM ??????????? Quiet ??????
Develops sound of Propelers rubbing after a few minutes of operation. Price is appealing but a bit problematic for my taste. Also 500 cfm, through a less than 5" duct????? 27.5" width may be a problem for some aplications. Already built the area to fit this unit, so will probably have to see if I can work out the issues, may end up with an external blower and leave the hood. All the the sizes are metric so be aware that some adaption will be needed.