Fans  are  manufactured in two main groups , axial fans and centrifugal fans .

 In axial fans air flow direction is parallel to the fan axis . The types of axial fans depend on          blades , shape , form , material and air flow direction .  

 Centrifugal  fans manufactured by  ISFAHAN DAMA  are as the following types :

- Forward  curved  blades     SWSI

- Forward  curved  blades    DWDI

- Backward  curved  blades  SWSI

- Backward  curved  blades  DWDI

- Backward inclined blades

   Performance , characteristics , and dimensions are given in the related catalogues .