Originally posted by TrueAmerican
reply to post by LoneGunMan
Thanks for replies folks. So Lone, is the above poster correct in saying that the FLIR measures skin temperature, and not the fire temperature? That doesn't seem right to me. The camera shots are of the opening where the fire was raging. I just want to clear that up please.
It measures heat. If there are exposures (openings in the structure) it will measure the heat of the fire. The fire is not as hot as the gases that build up above the fire either.
When we enter a structure fire we get this rolling heated gases above our heads, its one of the reasons for the cloth that drapes below the back of our helmets. It protects us from steam burns. What happens is when you are inside fighting the ceiling may look like its on fire but its actually super-heated gas and not the structure. You concentrate you lines on the fire only. You sometimes panic though because its rolling and raging just over your head and you adrenaline may over-ride your training and makes you redirect your stream tot he gases above your head. Then the water turns to steam and rolls down on the back of you and your neck (the reason for the fire proof cloth draped below your lid) when that happens you more than likely just lost the building. It disrupts the thermal layers and what was a few hundred degrees at the floor suddenly goes over a thousand and then you have to get out.
You cant control a fire from the outside, it has to be fought at the source. Its all rather complex and is why we have to train so much.





