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Duct Static Pressure
Static pressure measured in the supply air duct, typically 2/3 of the way down the longest duct run. Primary control input for supply fan speed in VAV systems.
Brick
Supply_Air_Static_Pressure_Sensor
Category
pressures
Typical Range
-
Object Type
-
Haystack
Tags
dischargeMarkerductMarkerstaticMarkerpressureMarkersensorMarkerpointMarker
Kind
Number
Point Function
sensor
Haystack Unit
inH₂O
Source Units
inWC / Pa
States
-
Aliases
Common
Common Misspellings
duct-stactic-pressure
Notes
- Typical setpoint for VAV systems is 1.0-2.0 inWC
- ASHRAE Guideline 36 recommends static pressure reset based on VAV box damper positions
- Sensor location at 2/3 point of the longest duct run is the industry standard
- Low duct static with fan at full speed may indicate duct leakage or obstruction