Enriched Air Nitrox

Enriched Air Nitrox definition: Enriched Air Nitrox (also abbreviated as Nitrox or EANx) is a gas mixture traditionally of about 22-40% oxygen and 78-60% nitrogen. It is used in scuba diving to reduce the proportion of nitrogen in the breathing gas mixture by increasing the proportion of oxygen which helps reduce the risk of decompression sickness and allows extended dive times without increasing the need for decompression stops.

When Enriched Air Nitrox is abbreviated as EANx it is appended with the oxygen percentage like EANx32 or EANx36 (which also happen to be the most common blends). Enriched Air always requires special cylinders and labeling and should only be used by those trained to dive on it.