ActronAir Indoor Evaporator Fan Blower 10x10 S 750W delivers higher-volume airflow than the 600W variant for larger Classic Series indoor units where the increased motor rating supports greater duct static pressure and longer runs without sacrificing airflow at the zone registers. The 750W 4-pole motor requires a matched 20uF run capacitor -- fitting a lower-rated capacitor will cause the motor to run on the start winding, resulting in rapid overheating and motor failure. Isolate power at mains before replacement -- live work on fan assemblies is dangerous and must only be performed by a qualified technician.