Hi everyone for some fumehood, especially the VAV fumehoods, they come with an emergency purge button which is supposed to increase the exhaust rate in the event of a spillage. I have just encounter an incident where a distillation was wrongly set up, the set up went flying after 2 hours and toluene was spead all over the fumehood. The researcher instinctively close the sash fully and activate the emergency purge mode. by then, the toluene had ignited and the activation of the purge mode actually fanned the fire. the fire was big enough to melt the flexible duct connecting the fumehood to the exhaust duct. the researcher was able to contain the fire within the fumehood and extinguish it with the fire extinguisher. we are debating over the question of whether to activate or not to activate the emergency purge button. any advise?
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