Air is a mixture of 21% oxygen, 78% nitrogen, and approximately 1% other gases; to simplify calculations this last 1% is usually treated as if it were nitrogen. Being cheap and simple to use, it is the most common diving gas. As its nitrogen component causes nitrogen narcosis it is considered to have a safe depth limit of about 40 metres (130 feet) for most divers, although the maximun operating depth of air is 66.2 metres (218 feet) Air is the most common and only natural breathing gas.Here at Easy Chango we are pumping single and double cylinder air fills. The best air in the Riviera Maya, we utilize 2 BAUER compressors, Vertecom and K10, filling at a rate of 500 liters/min. Breathing air purification its in accordance with EN 12021. It is vital that the quality of compressed air used in respiratory applications is in accordance with the required standards to prevent risk to human health.