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September, 2009 - PWM or Pulse-width modulation allows you to control RPM (speed of the fan) and allows you to control noise, increase the fan life and decrease power consumption. Click here for the Delta DC Fan Product Training PWM Fan presentation.

Innovation is evident everywhere in Delta's products. Along with their QS-9000 and ISO-9001 certification for brushless DC air cooling fans they are actively involved in meeting IP ratings. IP is International Protection Rating and protects against dust and water. Delta offers IP54, IP55 and IP56. Click here for the Delta DC Fan Product Training IP Rated Fan PowerPoint presentation, which will show you specific detail.