What are the two types of pressures in a duct system?

In a duct system, understanding the types of pressures involved is essential for effective airflow management and system performance. The two primary types of pressures are velocity pressure and static pressure.

Velocity pressure is associated with the speed or kinetic energy of the air moving through the duct. It is directly related to the airflow and contributes to how far and how quickly air can be distributed through the system. Essentially, the faster the air moves, the higher the velocity pressure.

Static pressure, on the other hand, represents the potential energy of air within the duct system. It is the pressure exerted by the air in all directions and is critical for maintaining airflow throughout the system, especially in overcoming resistance from ductwork, filters, and other components.

Together, these pressures help determine the overall performance of the duct system and play a significant role in ensuring that HVAC systems operate efficiently. Understanding the relationship and interaction between velocity pressure and static pressure allows professionals to design and manage duct systems more effectively, thereby optimizing energy use and maintaining desired temperature controls in building environments.