Static pressure is the pressure of a fluid when it is at rest relative to the measurement. It is the resistance to airflow in ductwork
. In fluid dynamics, many authors use the term static pressure in preference to just pressure to avoid ambiguity
. The static pressure is measured by a piezometer attached to the wall of the pipe where the fluid is flowing
. High static pressure means a lot of resistance; low static pressure means little resistance. The ideal static pressure would be close to zero
. Improper static pressure can cause issues such as noisier operation, HVAC units running longer, parts wearing out faster, and leaking ducts
