How does Essex smoke hoods work?
In general the Essex PB&R PBE, SCU, VRU+ and VRU operate nearly the same. These units each have a sealed bottle of compressed oxygen (the PBE, however, has two). To activate the oxygen, the user simply opens the hood from the sealed protective pouch, snaps open the hood, or pulls a little red initiation ball on string, slips the patented neck seal apart and then over the head. The patented silicone neck seal secures the hood in place and keep out the toxic fumes.
