// multi-utility computation suite · offline · instant · precise
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sci.fire-heat-release-rate-sprinkler Calculator
Calculates heat release rate (HRR) for design fires and sprinkler activation time from fire growth rate (t-squared fire model). Ultra-fast fire (α = 0.1876 kW/s²): HRR = 1 MW at t = 73 s — sprinkler response time index RTI determines activation relative to this growth curve.
Inputs
Q Kw
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Rti
Reference formula or conversion factor shown for context.
Ceiling Height M
Vertical measurement. For health calculators, typically standing height without shoes.
K Conductance
Reference formula or conversion factor shown for context.
Results
max ceiling jet temperature (°C)
The value at the specified point or condition.
max ceiling jet velocity (m/s)
Sample size or count used in the calculation.
sprinkler activation time estimate (s)
The computed duration or time value.
T_max = T_amb + 16.9·Q^(2/3)/H^(5/3)
Reference formula or conversion factor shown for context.
RTI classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
fire class at
The classification assigned based on the computed value.