According to FSS code, Chapter 3, regulation 2.2
An EEBD is a supplied air or oxygen device only used for escape from a compartment that has a hazardous atmosphere and Shall not be used for fighting fires, entering oxygen deficient voids or tanks, or worn by firefighters. In these events, a self contained breathing apparatus (SCBA) shall be used.
EEBD consists of:
- Cylinder: It consists of small cylinder carrying 5 litre oxygen, along with a demand valve and low pressure alarm.
- Hood & face piece: Fresh air or oxygen comes inside the hood and the face piece, which are connected to the cylinder through a demand valve.
- Clear window: A clear window is provided in the face piece and is made up of flame resistant material for clear sighting and smooth escaping.
- Pressure indicator: to know the remaining pressure, and while you will charge to know the limit.