Gas suppression systems are typically used in computer rooms or critical environments where water damage to assets by fire sprinklers will result in extensive financial loss and downtime to a business.
Typically when gas suppression is installed, it's desirable for sprinklers to be removed from the protected space. In order to remove the sprinklers, the room construction needs to be a 2 hour fire rated. It's important to provide pressure relieving vents to the room to allow excess gas to escape from the space. Failure to provide adequate pressure relief can result in damage to the room or sensitive equipment.
The Australian Standard that covers the requirements for gas suppression installations is AS 4214-2002 Gaseous fire extinguishing systems. The gas to these environments will be released after two (2) separate smoke detection systems have been activated due to the presence of smoke in the environment.
As the name suggests, the gas suppresses the fire's ability to combust, therefore ensuring that fire will not take hold in the environment. There are a few gases on the market that use slightly different methods to achieve the same result of suppressing fire.