Trane TRG-TRC013-EN manual Total Pressure, Velocity Pressure vs. Static Pressure

g

Total Pressure

velocity

pressure

fan

static pressure

total pressure (Pt) = static pressure (Ps) + velocity pressure (Pv)

	g M
cwt
°	x
—u	x
to the perpendicular outward “push” of the air against the duct walls.
The	is the sum of the velocity pressure and the static pressure.

Velocity Pressure vs. Static Pressure

vane

damper

fan

g N

For example, assume a fan is attached to a straight piece of duct that has a damper at the open end. To observe air movement, a hinged vane is suspended from the top of the duct.

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