The PADI Enriched Air Diver course is PADI's most popular specialty course. Why? Because diving with Enriched Air Nitrox (EANx) allows you to achieve longer no-decompression times, especially on repetitive dives. Staying under water longer and being able to get back under water faster after a break sounds so good to many divers that they have no hesitation in signing up for this course.
 PADI (Junior) Open Water Divers who are at least 12  years old can take a PADI Enriched Air Nitrox (EANx) Diving Specialty course. Please note that in some regions the minimum age is 12 or older due to government regulations  years.