Good brief article on gas appliance flame rollout (roll out)

[Michael Thomas]

Good brief article on flame rollout. Posted here for future reference.

Fire Science Training Institute (http://www.fsti.com/rollout.htm)

[David Banks]

Thanks Michael

[DavidR]

Nice article but it failed to mention the main cause of roll out in natural draft equipment.
High draft in the flue and mechanical room depressurization will do it many times and they are both usually overlooked.