Indicative: vent area ≈ floor area × factor where factor ranges 0.5%–2% by occupancy. Final value per CFD or smoke layer calc.
Result
- Geometric free area
- 10 m²
- Aerodynamic area (Cv 0.6)
- 6 m²
Formula: A_v = A_floor × factor
Reference: EN 12101-2
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