What is the typical room temperature during the incipient phase of a fire?

During the incipient phase of a fire, the conditions within the affected area start to change as a fire begins to develop. This phase is characterized by the presence of smoke and heat, as the material that is igniting begins to burn. While the room temperature in an undisturbed environment can be around 70℉, during the incipient phase, it typically rises slightly.

The answer indicating a temperature being slightly elevated, perhaps to 100℉, accurately reflects this scenario. As fire starts to smolder or ignite, heat from the combustion process causes the temperature to increase, but it may not yet reach extreme levels seen in later phases of a fire. This slight elevation indicates that fire is beginning to change the thermal conditions in the area. Understanding this temperature range is critical for fire personnel, as it helps them gauge the fire's development stage and plan appropriate responses.