Parallel operation

Operation curve of parallel fan and separate fan

Parallel operation is to use two or more fans in parallel. The volume of air volume generated by two fans in parallel is only twice that of a single fan in free space. When parallel fans are applied to the case of higher system impedance, the higher the system impedance, the lower the air volume that can be increased by parallel fans. Therefore, the application of parallel connection is only used under the condition of low system impedance, that is, the fan operates under the condition of almost complete free air supply.

Series operation

Operation curve of series fan and individual fan

Series operation is to use two or more fans in series. The static pressure generated by two fans in series can be twice under the condition of zero air volume, but in the case of free space, it cannot increase the air volume. An additional fan in series can increase the air volume in a system with high static pressure. Therefore, series operation can achieve the highest effect for systems with high system impedance.