Inergen is used to lower oxygen to ~12.5 %, from normal 21 %. Most fires need more than 16 % oxygen. Inergen consists of 52 % nitrogen, 40 % argon and 8 % carb

Inergen is used to lower oxygen to ~12.5 %, from normal 21 %. Most fires need more than 16 % oxygen. Inergen consists of 52 % nitrogen, 40 % argon and 8 % carbon dioxide. Carbon dioxide might sound strange, but it causes the heart to beat faster to compensate for the lowered amounts of oxygen. The whole point of Inergen is to quickly put out fires where water/foam/powder isn't usable and the room might contain people. It's cool stuff, and I was under the impression that basically all datacenters used it.