Which term describes the room or area where a fire began?

The term that describes the room or area where a fire began is referred to as the "Area of origin." This phrase is used in fire investigation to indicate the broader region where the combustion started. Understanding the area of origin is vital for investigators as it helps to establish the dynamics of the fire and can provide clues about the fire’s development and spread.

While "Point of origin" is often used interchangeably with "area of origin," it typically refers to a more specific spot within that area where the ignition took place. The term "fire scene" encompasses the entire site of the fire incident, including areas outside of where the fire originated, while "cause of ignition" pertains to the material or action responsible for starting the fire, and does not define a physical location. Thus, "Area of origin" is the most accurate term for identifying the room or area where the fire began.