Nitrox is any combination of nitrogen and Oxygen. Regular breathing gas is comprised of approximately 21% Oxygen and 79% Nitrogen. Nitrox mixtures with percentages of oxygen greater than 21% are called Enriched Air Nitrox (EANx). The commonly used EANx mixtures are EAN 32 (32% Oxygen and 68% Nitrogen) and EAN 36 (36% Oxygen and 64% Nitrogen). A prudent nitrox diver would also take advantage of a programmable nitrox computer to provide them with the added benefit of multi-level nitrox diving.

Nitrox was first used in 1912 and has been used extensively since the 1960's by the military and commercial operations and since 1985 in recreational diving. It is also used in the medical field as a therapy gas for hyperbaric wound care, breathing O2 at high PO2 levels under pressure has tremendous tissue healing benefits. Advanced divers have been taking advantage of Nitrox for cave diving, wreck diving and many other diving applications.

PADI Enriched Air Diver Certification
You need a Open Water Diver Certification. (You must be 15 years of age or older).
Just a little classroom work and a couple dives and you’ll be on your way.
Recommended Course Hours: 12
Minimum Open Water Training: two dives over one day