Centrifugal - Backward Curved Fan, Comes in two types, namely, SISW (single inlet single width) & DIDW (double inlet double width). “Pittsburg Locking” is used for all sizes of fans; housing & impeller are manufactured in GI Steel sheet. Discernible Features: Fan Size: 400 to 1400 mm Flow rates up to 4000 to 150000 cmh Pressures up to 100 Pa to 1600 Pa ApplicationFor commercial and industrial ventilation in AHU’s, Evaporative Cooler’s, other HVAC systems, etc. Please refer to our complete product catalogue for further detail Click Here