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NFIRS 5.0 Element: ‘Heat Source’

Also known as: ‘heatSource’

Definition: The heat source that ignited the ‘Item First Ignited’ to cause the fire.

Need something else? Here is the complete list of all NFIRS modules and subsequent NFIRS transactions, plus a list of all NFIRS elements.

NFIRS References

See Also

Relational Edit Rules for ‘Heat Source’

NFIRS 5.0 relational edit validation rules are provided to ensure NFIRS data is consistent and correct for the fire/reporting concepts that are being modeled. Relational edits determine relationships between multiple fields / elements. These are the rules for ‘Heat Source’.

Rule Group  Overview 
Relational Edit Rule 47 Documentation relational edit rule 47.
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NFIRS Coding

Here are the NFIRS codes for the ‘Heat Source’ element, including any “other” values in case none of the preselected choices match:

Common Examples of Heat Source

More commonly used values for Heat Source…

Heat Source  Code 
Electrical Arcing. 13
Heat From Powered Equipment- Other. 10
Hot Ember or Ash. 43
Lightning Discharge. 73
Heat Source: Other. 00
Heat Source: Undetermined. UU

Groups within ‘Heat Source’

All values for Heat Source

Operating Equipment:
  • 11 - Spark, Ember or Flame From Operating Equipment.
  • 12 - Radiated, Conducted Heat From Operating Equipment.
  • 13 - Electrical Arcing.
  • 10 - Heat From Powered Equipment- Other.
Hot or Smoldering Object:
  • 41 - Heat, Spark From Friction.
  • 42 - Molten, Hot Material.
  • 43 - Hot Ember or Ash.
  • 40 - Hot or Smoldering Object- Other.
Explosives, Fireworks:
  • 51 - Munitions.
  • 53 - Blasting Agent, Primer Cord, Black Powder Fuse.
  • 54 - Fireworks.
  • 55 - Model And Amateur Rockets.
  • 56 - Incendiary Device.
  • 50 - Explosive, Fireworks- Other.
Other Open Flame or Smoking Materials:
  • 61 - Cigarette.
  • 62 - Pipe or Cigar.
  • 63 - Heat From Undetermined Smoking Material.
  • 64 - Match.
  • 65 - Lighter: Cigarette, Cigar.
  • 66 - Candle.
  • 67 - Warning or Road Flare; Fusee.
  • 68 - Backfire From Internal Combustion Engine.
  • 69 - Flame/Torch Used For Lighting.
  • 60 - Heat From Other Open Flame or Smoking Materials.
Chemical, Natural Heat Sources:
  • 71 - Sunlight.
  • 72 - Spontaneous Combustion, Chemical Reaction.
  • 73 - Lightning Discharge.
  • 74 - Other Static Discharge.
  • 70 - Chemical, Natural Heat Source- Other.
Heat Spread From Another Fire:
  • 81 - Heat From Direct Flame, Convection Currents.
  • 82 - Radiated Heat From Another Fire.
  • 83 - Flying Brand, Ember, Spark.
  • 84 - Conducted Heat From Another Fire.
  • 80 - Heat Spread From Another Fire- Other.
Other Heat Sources:
  • 97 - Multiple Heat Sources Including Multiple Ignitions.
  • 00 - Heat Source: Other.
  • UU - Heat Source: Undetermined.

Transactions containing ‘Heat Source’

A few NFIRS elements are reused accross a number of transactions, but typically the value is captured by one transaction only.

Element Specification

 Specification   Value 
Requirement Mandatory
Expected Length 2
Element Type Coded Field - The coded field relating to an entry in the code table. Most coded fields allow for Plus+ One codes. For these fields the expected length of the coded entry is depicted as (National length OR Plus+ One length). Only fields with this notation in the expected length column allow for Plus+ One definitions. If the user has not provided information, an empty field should be transmitted.
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