This document describes various potential sources of ignition that could start a fire. It discusses natural sources like lightning and geological events. It also examines human-related sources such as smoking materials, matches, lighters, appliances, chimneys and more. The key is that an ignition source must be able to produce enough sustained heat to ignite the first fuel. Proper identification of the ignition source requires a scientific investigation to determine what was the competent heat source in any given fire.

1. Sources of Ignition Chapter 9

10. Matches Figure 9-4 The wind and waterproof match has a higher chemical content as can be seen in comparison of the safety match in the bottom of the photo. The strike anywhere match may have two colors which would indicate the two chemical components necessary for the reaction.

13. Hobby Micro Torch Figure 9-5 This micro torch, which uses butane, is only 4 inches long and can easily be carried in a pocket.

14. Other Hobby Ignition Sources Figure 9-6 Model rocket motors and their igniters can be found in hobby stores.

21. Metal Chimneys for Fireplaces Figure 9-7 Burn pattern of a fire that started at the firebox of a zero-clearance Stove with metal chimney. Notice that the wooden chimney chase, with the exception of the base, has been consumed.

22. Brick Chimneys for Fireplaces or Woodstoves Figure 9-11 The liner extending above the brick indicates the chimney is lined.

34. Larger Appliances Figure 9-14 Small heater in the closet area became a hazard when the occupant stuffed dirty clothes in and around the water heater, forcing combustible materials up against the unit.