Critical heat flux at extinguishment (CFE)

Incident heat flux at the surface of a specimen at the point along its horizontal centreline where the flame ceases to advance and may subsequently go out Note 1 to entry: The heat flux value reported is based on interpolations of measurements with a non-combustible calibration board. Note 2 to entry: The critical heat flux at extinguishment is expressed in kilowatts per square metre (kW/m2).