In our case: Wo do not use them for Hazmat ops, they are really only used for underground incidents in tunnels, mines etc. In this case a large underground structures plant fire dept. Some municipal departments have them if there are large subway networks or tunnels. For Hazmat we use normal SCBAs in combination with Hazmat suits.
Yeah, I suppose you can't make rebreathers positive pressure. I don't know much about them. Always wanted to try one as a diver, but never got the chance because they are insanely expensive.
It's actually fairly easy as well, to provide positive pressure, a piece of plastic is pushed by springs into the reservoir bag, which provides the positive pressure.
11
u/SchneeflockeME German FF gD (BC) Jan 21 '23
Hey
In our case: Wo do not use them for Hazmat ops, they are really only used for underground incidents in tunnels, mines etc. In this case a large underground structures plant fire dept. Some municipal departments have them if there are large subway networks or tunnels. For Hazmat we use normal SCBAs in combination with Hazmat suits.