I wonder with this set up the same rules of scuba gear would apply? Breathing the air from a scuba tank is compressed and the greater the depth greater the risk of getting narc,

Found this on a google search

Many sport divers consider the "high" associated with Nitrogen Narcosis to be a desirable event. I have to admit that I like it too. In fact, sometimes it brings me back to the good 'ol days of the late 70's and early 80's when life was simple. Most of you know what I mean... But, let's consider some of the dangers associated with breathing compressed air at depths below 80 feet.

The Basic Scuba Diver Course teaches that as the pressure increases the volume of the breathable air decreases and its density increases. This increase in density is the basis for the dive tables. The human body is allowed to absorb more Oxygen and more Nitrogen than it normally would at the surface. The Oxygen is a good thing - we feel great. However, the nitrogen is physiologically inert (meaning it is not metabolized - the body doesn't use it or need it to survive). However, it is absorbed in all body tissues and therefore has an affect on the body. When excess nitrogen is absorbed into the cerebral tissues (the brain) it interferes with the nervous system. The more nitrogen present, the greater loss of performance. The results are impairment of intellectual capacity, degradation of neuromuscular performance, and changes in mood and behavior.

Since its not compressed in your tank on your back but being pumped down a line to your regulator. Could be though through any means the air would compress in the line increasing your oxygen and nitrogen levels.

Its really not all that expensive to become a recreational open water diver, probably 500 bucks and you can rent your tank and bc for around 50 bucks a weekend if I remember right, plus its fun. My family are all certified although we haven't been on a dive in a few years and need a refresher course when we plan a tropical vacation here in the next year or so.

A little snow, Please!