What does the term “backdraft” refer to in combustion safety?

The term "backdraft" refers specifically to a situation in which there is a reversal of airflow. This phenomenon can occur in scenarios where there is a negative pressure differential, causing air from outside to be drawn back into a system unexpectedly. In combustion safety, this is particularly concerning because it can lead to toxic combustion gases, such as carbon monoxide or smoke, entering living spaces.

Understanding backdraft is crucial for ensuring safety in environments where combustion appliances are used. Proper venting and airflow management are critical to prevent backdraft situations, which can pose significant health risks to occupants. Recognizing and addressing factors that can lead to backdraft conditions is a key aspect of maintaining safe combustion practices.