ebm-papst RVE45 Powerful and Quiet DC Centrifugal Fans offer a 16V to 30V voltage range, 50dB to 58dB sound pressure level, and up to 1250mA current consumption. The RVE45 series is the next step up from the RV45 series and has the advantage of built-in electronics. These fans feature more design freedom, greater efficiency, and significantly lower noise levels. RVE45 fans have a compact design of 65.5mm x 64.5mm x 64.1mm with a counterclockwise rotating direction and ball bearing system. ebm-papst RVE45 DC Centrifugal Fans are highly dynamic, allowing them to switch between high and low pressures quickly and reliably, making them ideal for high pressure/low airflow applications. Typical applications include CPAP, BiPAP, respirators, and breathing masks.