Inlet damper control on a fan affects power consumption how?

Inlet damper control on a fan indeed requires less power to drive the fan at reduced loads. When the inlet damper is partially closed, it restricts the airflow into the fan. This restriction helps to modulate the flow rate and allows the fan to operate efficiently under varying load conditions. By reducing the airflow when full capacity is not needed, energy consumption decreases, leading to power savings.

This method of control is particularly beneficial in applications where the demand for airflow significantly fluctuates. Instead of running the fan at full speed when lower air volumes are required, closing the inlet damper achieves the necessary reduction in power consumption and maintains operational efficiency. Thus, the correct choice highlights the energy-saving benefits of using inlet dampers in fan systems.