The Bowler Rotor is typically suited to higher efficiency, higher pressure applications where overall system efficiency is a key factor or where a scroll housing is not required. The benefit of using a backward curved motorised rotor is that it does not have a stall point on its characteristic. This means that there is no point on the fan characteristic curve that it should not be operated. The Forward Curved Rotor has a larger rotor exit-to-inlet area ratio and a larger number of rotor blades in comparison with centrifugal pumps and compressors. The Bowler Rotor is very efficient and useful.