Pressure
Gaseous fire suppression systems work utilising pressurised cylinders so that the extinguishing agent is expelled from the cylinders into the affected area. These pressures vary from system to system but at a minimum all cylinders must be certificated by a recognised authority to a minimum specification.

Safety
Modern day systems are normally designed for occupied areas. In other words if needed the systems should be safe to any person located within the protected area during a discharge. If you refer back to Q1 How a fire is suppressed you will see that by removing oxygen from the environment a fire is extinguished. Inert gas systems work by lowering the oxygen content in the protected area from around 21% to 16% so that a fire will be extinguished but life can be supported. Correct system design is thus essential for safety. Alternatively if the oxygen level is not sufficiently decreased then the fire will not extinguish.

Dangers
Halo Carbons such as FM200 work by cooling the fire and any direct contact on the skin can result in skin burns. (Frostbite)

These are only a few of the issues that are noted and addition fire suppression must be supported by a reliable and effective detection systems.