Trane TRG-TRC013-EN manual Fan - System Interaction, System Resistance Curve

g

System Resistance Curve

static pressure

system resistance curve

2.0 in. H2O

[491 Pa]

0.65 in. H2O

[159 Pa]

2,000 cfm	3,500 cfm
[0.94 m3/s]	[1.65 m3/s]

airflow g EN

L

various airflows, to overcome the resistance—or static-pressure loss—within this particular system.

Fan – System Interaction			design system
			resistance curve
static pressure	surge	$
	region
		airflow	g EO

Fan – System Interaction

L x”

will balance—design operating point e.

If the installed system resistance is different from that assumed during the design process, the fan-and-system balance point—the operating point—will not be as intended. This means that the fan and system will balance at a point that has a higher or lower airflow, static pressure, and input power.

caQ3caM6793O[ 7B