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Clean Agent & CO₂ Quantity Calculator.

Total flooding agent quantity for FM-200 (HFC-227ea), Novec 1230 (FK-5-1-12) and carbon dioxide — with net volume, design concentration, temperature, altitude, design factors and occupant safety checks in one place.

NFPA 2001 · 2018 NFPA 12 SI UNITS PRINTABLE CALC SHEET
Calculation sheet
Orange box = fill in for your roomDashed box = optional, defaults already applied

1Project

2Enclosure volume

NFPA 2001 §5.5.1 — net volume = gross volume minus fixed structures impervious to the agent. Each void is calculated as its own volume, as each needs its own nozzles. Tap a void on the drawing to include or exclude it.

3Hazard & design concentration

%
Design = MEC × 1.3 (§5.4.2.3)
%
From the system's UL/FM listing

4Environment

°C
Sets agent quantity
°C
Sets peak concentration
m
Only matters above ±915 m
5Design factors & cylinders OptionalApplied▾
Leave this closed for most rooms. The defaults (0–4 tees, 0%) add nothing, so the agent quantity does not change. Open it only if one of these applies:
  • Tee count — only when one cylinder bank serves several rooms through selector valves. Count the tees on the pipe isometric or the listed flow calculation; NFPA 2001 Table 5.5.3.1 adds 1–12% from 5 tees upward.
  • Additional factor — your engineering judgement from the site survey (§5.5.3.2): unclosable openings, obstructions, re-ignition risk or acid gas control. Ask the AHJ or the listed manufacturer if unsure.
  • Agent per cylinder — the listed cylinder size you plan to use. It only works out the number of cylinders and fill check; it never changes the kg required.
One supply, multiple hazards only (§5.5.3.1)
%
Openings, obstructions (§5.5.3.2)
kg
FM-200 required
0.0kg
—
Net volume—
Design conc.—
Flooding factor—

Agent storage

Life safety check

Breakdown by volume

Step-by-step

    1Project

    2Type of fire

    %
    Never below 34% (NFPA 12 §5.3.2)

    3Enclosure volume

    m
    m
    m
    m³
    4Losses, temperature & cylinders OptionalApplied▾
    Leave at 0 for a closed room with HVAC shut down on discharge. Fill in only what applies: openings that cannot close, fans that keep running, or room temperatures above 93 °C / below −18 °C. Cylinder size only sets the cylinder count.
    m²
    Preliminary 5 kg/m² × MCF
    m³/min
    Air moved in 1-min discharge
    °C
    Corrects above 93°C / below −18°C
    kg
    Expected loss over hold time
    kg
    Typical high-pressure cylinder: 45 kg
    CO₂ required
    0.0kg
    —
    Net volume—
    Design conc.—
    Min. flow rate—

    CO₂ storage

    Life safety

    Step-by-step

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