Power adjustment methods: 1) Variable Frequency Drive (VFD) β most efficient, adjusts motor speed, 2) Inlet/outlet dampers β simple but less efficient, 3) Variable pitch blades β for large industrial fans, 4) Multiple fan staging β for variable load systems.
Power adjustment methods: 1) Variable Frequency Drive (VFD) β most efficient, adjusts motor speed, 2) Inlet/outlet dampers β simple but less efficient, 3) Variable pitch blades β for large industrial fans, 4) Multiple fan staging β for variable load systems.