Escape-stair pressurisation fan: door leakage (BS EN 12101-6 or gaps), doors-closed and doors-open air, door force, stack effect, relief damper, injection points, riser, BOQ, DXF.
NBC 2016 Part 4 · BS EN 12101-6 · NFPA 92
| Field | Type / default | Meaning |
|---|---|---|
| Code & criteria | ||
| Code basis | choice default india | India — NBC 2016 Part 4 targets + BS EN 12101-6 method, BS EN 12101-6 / EN 12101-13 classes (UK, Gulf, Europe), NFPA 92 / NFPA 101 (US, international) |
| Purpose (sets the open-door air speed) | choice default escape | Means of escape — 0.75 m/s, Escape + fire-fighting — 2.0 m/s |
| BS EN 12101-6 system class | choice default A | Class A — means of escape, defend in place, Class B — means of escape and fire-fighting, Class C — escape by simultaneous evacuation, Class D — escape, sleeping risk, Class E — escape by phased evacuation, Class F — fire-fighting system and means of escape |
| Building sprinklered | yes / no default True | |
| Ceiling height of the fire floor (non-sprinklered) | choice default 2.7 | 2.7 m — 25 Pa, 4.6 m — 35 Pa, 6.4 m — 45 Pa |
| Design pressure difference, doors closed (0 = code value: NBC 50 Pa · EN class · NFPA min) | number (Pa) default 0 | |
| Air speed through the open door (0 = by purpose / class) | number (m/s) default 0 | |
| Maximum door-opening force (0 = code: India 110 N · EN 100 N · NFPA 133 N) | number (N) default 0 | |
| Door-closer force at the handle | number (N) default 40 | |
| Building | ||
| Floors served by the stair (incl. ground / basements) | number default 15 | |
| Floor-to-floor height | number (m) default 3.3 | |
| Outside design temperature — summer | number (°C) default 45 | |
| Outside design temperature — winter | number (°C) default 10 | |
| Inside (shaft) temperature | number (°C) default 27 | |
| Supply injection at least every … floors (above 11 m) | number default 3 | |
| Stair doors & openings | ||
| Stair doors per floor | number default 1 | |
| Stair door | choice default single_in | Single leaf — opens into the pressurised space (0.01 m²), Single leaf — opens out of it (0.02 m²), Double leaf (0.03 m²) |
| Stair door width (clear, whole door) | number (m) default 1.0 | |
| Stair door height | number (m) default 2.1 | |
| Door leakage from | choice default table | BS EN 12101-6 Table A.2 values, Gaps round the leaf (mm) |
| Gap — sides (each) | number (mm) default 3 | |
| Gap — head | number (mm) default 3 | |
| Gap — threshold (undercut) | number (mm) default 6 | |
| Final exit doors at ground | number default 1 | |
| Final exit door | choice default double | Single leaf — opens into the pressurised space (0.01 m²), Single leaf — opens out of it (0.02 m²), Double leaf (0.03 m²) |
| Final exit door width | number (m) default 1.5 | |
| Final exit door height | number (m) default 2.1 | |
| Roof / other doors | number default 1 | |
| Roof door | choice default single_out | Single leaf — opens into the pressurised space (0.01 m²), Single leaf — opens out of it (0.02 m²), Double leaf (0.03 m²) |
| Windows in the stair | choice default none | None, Pivoted / side-hung, no weather-strip, Pivoted / side-hung, weather-stripped, Sliding |
| Window opening joints (total) | number (m) default 0 | |
| Permanent vent at the stair head (0 if the AOV stays shut) | number (m²) default 0 | |
| Include wall leakage (ASHRAE ratios — BS practice leaves it to the unidentified allowance) | yes / no default False | |
| Stair wall construction | choice default average | Tight (RCC / plastered block), Average, Loose |
| Stair plan length | number (m) default 6.0 | |
| Stair plan width | number (m) default 3.0 | |
| Doors-open case | ||
| Stair doors open at the same time (fire floor) | number default 1 | |
| Final exit door open at the same time | yes / no default False | |
| ΔP across the other closed doors, door open | number (Pa) default 10 | |
| Fan, ducts & air distribution | ||
| Allowance for unidentified leakage | number (%) default 25 | |
| Duct leakage allowance on the fan | number (%) default 15 | |
| Over-pressure control | choice default prd | Barometric pressure-relief damper(s), Pressure sensors + VFD on the fan |
| Standby fan (duty + standby) | yes / no default True | |
| Duct run fan → farthest outlet (0 = shaft height + 10 m) | number (m) default 0 | |
| Duct friction | number (Pa/m) default 1.0 | |
| Fittings allowance on duct friction | number (%) default 50 | |
| Intake louvre + dampers + grille losses | number (Pa) default 125 | |
| Fan total efficiency | number (%) default 60 | |
| Supply grille face velocity | number (m/s) default 3.0 | |
| Riser duct velocity | number (m/s) default 8.0 | |
| Output | Content |
|---|---|
| Results, checks, worked steps, schedules; report, Excel and DXF exports. | |