Originally Posted by moparmanicac
Do you guys ever see the actual need for anything more than a halfhour tank my dept. switched to half hour scotts years back before I was on because they found the heavier tank just made you more tired and you were not very useful in an IDLH situation after a halfhour anyway. I guess that makes sense to me but a part of me also thinks that by now the weight of a 45min take is much less than that of the older ones
You can get carbon fiber cylinders now that weigh almost nothing. A hp 30 min carbon draeger bottle weighs 13lb, the 60min scott carbon cylinders weigh 25lb. They are a lot better than the aluminum or steel cylinders.
I can't comment on how much firefighters use, but we commonly go through or 45 min bottles on jobs. When you are inside a class-B exposure suit, you want as long as possible before swapping cylinders because it is a royal pita to strip out of one of those suits, hence why we use ska packs so much.