Leaderboard

Good thinking! That'll give you a reasonable test. You know what regulator and mask to get? Don't buy the regulator at Airgas -- about 3x as much $ and might not have the barbed fitting you need for the mask tubing.

Since you've read everything first (thank you!), and I have nothing negative to contribute, I'll just mention that it might be less expensive than $250 to get an O2 prescription at a walk-in clinic. If you have any official piece of paper saying you have a CH diagnosis, you could call around to walk-in clinics (if there are more than one near you) and ask whether they will prescribe O2 for your CH. (This isn't a crazy scheme I'm making up; I know of two people who have done it.) As you have probably read, the good thing about getting medical O2 is that they deliver, so you don't have to do the schlepping of tanks during a cycle.