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Homeland Security Science and Technology

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Respiratory Protection for Overhaul

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[Alan Burtsch] Overhaul is the phase of
Firefighting that occurs after

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the active flames have been extinguished and the
purpose of overhaul

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is to make sure that all the fire has been extinguished.
[Mary Kate Black] You're looking to make sure

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that there's no hot spots behind walls. Up in the ceiling

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nothing combustible that can cause a re-ignition, which is

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we don't want to go to the same house two days in a row.

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[Lori Brill] We are losing Firefighters in a very young
age due to cancer. Cancers that Firefighters only get

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and it's linked to doing overhaul without any kind of

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protection on and the reason being is Firefighters
are taking that gear off cause the fires

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out right. So everything must be good, but it's actually not.
All those toxins are still in the air.

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[William Deso] The requirement for the
respiratory protection during overhaul

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project came from our First Responders. They were

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looking for a system that would be lighter

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and more comfortable to wear than your SCBA's.

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And they wouldn't have to keep leaving every 30-45 minutes
to get it refilled.

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We had developed a filter that was specially designed

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to remove the products of combustion for structural fires.

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So we wanted to test it in three different configurations.

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The first was just a single APR

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Air Purifying Respirator that relies on lung power.

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Second was a single filter powered air

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purifying respirator. The final configuration was a two

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filtered powered air purifying respirator.

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[Mary Kate Black] During overhaul I usually wear my SCBA,
my self-contained breathing apparatus

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which weighs about 22 pounds and gives me
20 minutes of work.

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So to have something that is a quarter of the weight and

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I can change a filter instead of a bottle
and continue working it's wonderful.

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[For more information: first.responder@hq.dhs.gov]

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[Homeland Security Science and Technology]