The components of the counterflow closed-loop cooling tower feature a two-speed motor, which provides capacity control. The fan does not need to operate at full load when the load decreases or the local wet-bulb temperature changes, which can be achieved through the two-speed motor, thus saving energy. Additionally, the fan can significantly reduce the noise of the unit when running at low speed.

Variable Frequency Motor: Variable frequency motors are suitable for condensers that require variable frequency drive for capacity control. They enable energy to be infinitely adjusted.

Electronic Water Level Controller: Cooling towers can be equipped with an electronic water level controller to replace the standard mechanical float ball water topping system. It features water level control without the need for on-site adjustment.