Pipe fan / rack-mounted fan VKO1 TURBO - exactly what I was looking around the house exhaust system einzubauen.Einfache assembly, kompackt and with 16watt shaft to 137m³ / h is not noisy. Time, manual, or Vernsteuerung is möglich.Dieser fan has built ball bearings whose service life is 30 000 hours, as that is about 1250Tagen !! So for *****! ...