What is static pressure developed by a fan?

The correct response highlights the concept of static pressure in the context of a fan and ducting systems. Static pressure is defined as the pressure exerted by the air within a duct system against the walls of the duct. It is crucial for maintaining airflow and determining how effectively air can be delivered to different areas of a space.

Static pressure is a measure of the energy contained in the air due to its position and is not influenced by the velocity of the air movement at that particular point. This is essential for understanding how well a system can manage air movement and distribution, especially in HVAC applications where maintaining air quality and comfort is critical.

In contrast, other choices refer to different aspects of air pressure in a system. Moving air would relate more to dynamic pressure, which is related to the velocity of the air itself, while total pressure combines both static and dynamic pressures. Recognizing the specific role of static pressure aids in designing and troubleshooting air handling systems effectively.