Marathon offers a wide range of Centrifugal Fans with highly efficient impellers of type Backward Inclined, Backward Curved, Aerofoiled, Forward Curved and Straight Radial, depending upon application. Marathon® Centrifugal Fans are suitable for air delivery up to 300,000 M3/ Hr and Static Pressure up to 800 MM WG. Fans are available both in single inlet single width (SISW) and in double inlet double width (DIDW) versions.