Definitions for "PRESSURE DIFFERENTIAL"
Any difference in pressure between two points in a system.
The difference in water pressure between two points in a hydraulic system.
The difference in pressure between two specific points in two separate airstreams (i.e. supply airflow static pressure verses exhaust airflow static pressure).
The measurement of air pressures between two adjoining areas where the air pressure in the more stringently classified area is higher than the pressure of the next classified area.