Impeller Fan: Cleantek manufacturing Reverse Curve Impeller fan, Forward Curve Impeller Fan, Radial type Fan, Custom made Models,Imported Blower Fans, Aluminum Fan, Mild Steel Fan, Stainless Steel fan etc. Fan Economics: Fan Power Required (P) = q X p Pf = Power required by fan impeller W or kW qv = volumetric flowrate m3/s pf = fan pressure Pa or kPa Impeller Fan Impeller fan for blowers