What does the term "flame rollout" refer to?

The term "flame rollout" specifically refers to a condition where flames escape from the combustion chamber of a gas furnace. This scenario indicates a potentially dangerous situation, as it can lead to flames being present outside of the designated combustion area, which poses a fire hazard and can compromise the safety and efficiency of the heating system. Proper furnace design includes safety features to prevent this occurrence, and if it does happen, it often indicates that there is an issue requiring immediate attention, such as blockages in exhaust pathways or faulty components. Understanding this term is crucial for anyone involved in HVAC, as recognizing and addressing flame rollout is essential for maintaining safe and effective heating systems.