Smoke extract calculator
Smoke control system calculation to SP 7.13130
Room parameters
Corridors without daylight
For a corridor, SP 7.13130 derives the smoke extract rate from the doorway on the escape route, so corridor area and height do not affect the rate — they are used only in the checks. Choose another room type to have the rate computed from area and air change.
Fire parameters
9 m²
Automatic fire suppression
System
Results
Smoke extract rate
15 900 m³/h
From the velocity through the doorway (v = 1.5 m/s)
316°C
Smoke temperature
810 kW
Heat output
600 Pa
Fan pressure
Ø650 mm
Duct (15 m/s)
Stairwell pressurisation
32 100 m³/h
Pressurisation airflow
30 Pa
Pressure drop (typical 20–150 Pa)
Stack effect in the shaft: -88.4 Pa