The MRS Series fans are large airflow, high static pressure and high-efficient AC input axial fans, available in frame sizes ranging from 5.51 in. to 9.84 in. (140 mm to 250 mm). Models are also available with built-in alarm circuits that can detect fan rotation abnormalities and respond by outputting alarm, allowing for service to be performed.
A Variable Flow model is also available in a frame size of 7.09 in. (180 mm) and features an internal power control device which allows adjustment of airflow to match the cooling requirements.