DC Centrifugal Blowers CUI Devices DC Centrifugal Blowers are available in frame heights from 7mm to 33mm and widths from 35mm to 120mm. These fans feature a ball bearing, sleeve bearing, or omniCOOL™ system construction with rated voltages from 5VDC to 24VDC. These CUI Devices DC blowers come standard with auto-restart protection on all models and feature airflows ranging from 0.57CFM up to 44.2CFM. With multiple speed options available to meet a variety of thermal management needs, these centrifugal blowers are an ideal forced air-cooling solution for high back pressure applications in industrial and telecommunication industries.