SMOKE VENTILATION SIZER

Under construction / modifications

CED — NFPA 204 Smoke and Heat Vent Sizing Utility
CED Critical Engineering Desgin
NFPA 204 Smoke and Heat Vent Sizing Utility — Technical Screening Assessment
CED ENGINEERING SAFETY SCREENING NOTICE: Preliminary Feasibility Estimate Only [Citing NFPA 204 Mathematical Hand-Calculations Core]. This calculation engine models steady-state buoyancy boundaries and must be validated via definitive site plan review, advanced localized computational zone/field simulations, and official Authority Having Jurisdiction (AHJ) code approvals before procurement.
System Metrics Layout
Selects whether the fire reaches a steady peak immediately or grows over time following a t-squared curve.
Controls how fast an unsteady fire grows in intensity (kW) per second squared.
kW/s²
The exact elapsed time from ignition at which the engineering system capacity is evaluated.
seconds
The maximum thermodynamic power limit cut-off representing peak fuel consumption limits.
kW
The potential heat energy output generated per square meter of active burning material.
kW/m²
The vertical elevation height measured directly from the ground fuel plane up to the roof deck.
m
The clean air safety height to maintain above the floor for occupants and first responders.
m
Initial indoor and outdoor atmospheric reference baseline temperature absolute condition.
K
The aerodynamic efficiency factor representing frictional flow loss through an open roof vent.
scalar
The structural discharge coefficient representing kinetic air resistance across low-level inlet windows.
scalar
Proportional metric evaluating lower level makeup intake clear footprint relative to open roof grids.
ratio
The total number of physical vents across the roof to split the total geometric area requirement.
units
Curtain & Reservoir Module (NFPA 204 Ch 7)
The total horizontal contiguous layout floor space area being evaluated for smoke containment segmentation.
m²
The single longest continuous uninterrupted horizontal span axis length along the ceiling deck plane.
m
Dictates the maximum allowable square meter coverage boundaries limits allowed for a single reservoir.
Calculated Sizing Metrics
CRITICAL SYSTEM THRESHOLD VIOLATION
Total Geometric Vent Area
0.00 m²
Area Per Vent Unit
0.00 m²
Smoke Plume Mass Flow
0.00 kg/s
Layer Temperature
0.00 °C
Draft Curtain Validation Specification
Required Curtain Pocket Depth
0.00 m
Min Separate Reservoirs Needed
0 Units
Algebraic Calculations Audit Trail