What type of pressure does a manometer measure in relation to a fan?

A manometer measures the total pressure in relation to a fan. Total pressure is the sum of static pressure and dynamic (or velocity) pressure. In the context of a fan, total pressure indicates the energy content of the air being moved, including both the pressure resulting from the air’s kinetic energy (dynamic pressure) and the pressure exerted in all directions by the air at rest (static pressure).

When using a manometer, it is designed to capture both facets of pressure simultaneously, allowing for an accurate assessment of the total energy in the airflow. Understanding total pressure is critical when evaluating the performance and efficiency of a fan, as it gives insights into how effectively the fan is moving air against system resistance.

Static pressure and dynamic pressure are individual components of total pressure, while velocity pressure is specifically related to the kinetic energy of the airflow. Knowing total pressure helps in practical applications such as duct design, balancing airflow, and ensuring optimal fan performance.