Preset:

Protected space

Room volume (m³) ?Net volume of the protected enclosure. Drives clean-agent quantity directly (W ∝ V). Deduct solid obstructions; do not deduct racks.

Floor area (m²) ?Floor area for spot smoke-detector coverage (NFPA 72 ~84 m² per detector / ~9.1 m spacing).

Ambient temperature (°C) ?Design temperature at discharge. The agent's specific vapour volume s = k1 + k2·T rises with T, so warmer rooms need slightly more agent mass.

Clean agent

Agent ?Suppression agent. Halocarbons (Novec 1230, FM-200) discharge in ≤10 s by mass; inert gases (IG-541) flood by volume. GWP differs by ~3000× — Novec 1230 GWP 1 vs FM-200 GWP 3220.

Design concentration (%) ?Design concentration. Leave at the agent default (Class-A) or override. Must stay ≤ the agent's NOAEL for an occupied space.

Lithium-ion BBU (optional)

Battery chemistry ?BBU chemistry. NMC (datahallAI uses 8× 1,333 kWh NMC) runs away at ~150 °C; LFP is safer (~167 °C). "None" hides the Li-ion panel.

Pack energy (kWh) ?Battery energy in the protected room. Drives the thermal-runaway heat release and vent-gas (off-gas) volume — the basis for NFPA 855 gas detection + ventilation.

Fire-protection results

engine —

How to read this. Every figure is Derived by the validated fire engine (js/fire-engine.js, 31/31 tests) from your inputs. Clean-agent mass uses the NFPA 2001 equation W = (V/s)·(C/(100−C)); inert agents use ln(100/(100−C)). A green rail = within band, amber = watch, red = out of band / hazard. Occupant safety: the design concentration must stay ≤ the agent NOAEL. Li-ion: the off-gas volume from a battery in thermal runaway vastly exceeds any room's flammable limit — so early H₂/CO off-gas detection (UL 9540A / NFPA 855) + ventilation is the primary mitigation, ahead of suppression. PG-class / cost values are illustrative. Not a substitute for a fire-protection engineer's stamped design.