Figure 1 Figure 3 4 National Oilheat Research Alliance Figure 2 Velocity Pressure The word velocity means speed. High pressure air always travels toward lower pressure. Velocity pressure determines the speed the air moves through the ductwork. The pressure coming out of the end of the balloon is velocity pressure. In Figure 3, a manometer is connected to show velocity pressure. As shown, the pitot tube must have its opening pointing into the airflow. (Figure 3, below) faces of the ductwork. The ductwork is pressurized just like the balloon is inflated. Static pressure in the duct pushes in all directions inside the duct. This static pressure creates resistance to airflow. Figure 1. Static pressure can be measured using a manometer via the static pressure openings on a pitot tube or a static pressure tip. Higher static pressure leads to lower airflow. Figure 2.
NORA Advanced Air Flow
To see the actual publication please follow the link above