RS PRO ODB600PT Series Blower Centrifugal Fan, 24V dc, 30 cfm, DC Operation 120 mm x 32mm x 120 mm. Series ODB600PT. RS PRO Centrifugal Fan, 120 x 120 x 31 mm, 30 CFM, 24 V DC. This centrifugal fan or blower from RS PRO recirculates and propels air in air conditioners and air conveyors.