Oxygen is oxygen.rosiefrosie wrote:The reason for this is that oxygen may accumulate within the flow generator and can create a risk for fire. I'm not sure if using a oxygen concentrator makes a difference
Well, first, oxygen is not flammable under any circumstances you are likely to encounter in your home. Perhaps it is flammable on the surface of a star? I suppose every element is "flammable" there.rosiefrosie wrote:oxygen delivered by the concentrator uses room air and the oxygen content is not flammable as in tanks under pressure and I think with a higher O2 content
Oxygen is, however, an accelerant. That means if you have a fire, it's going to be a LOT worse in the presense of a higher concentration of oxygen.
I agree that having oxygen under pressure presents a potentially bigger problem; however, I believe that all oxygen tanks must have a regulator of some sort before you can use them. Unless you are talking about a fire that would cause the tank to explode, I'm not sure there's much of a difference. Please note that once you have a fire going, it's not really going to matter how it got there, you need to put it out, or get out and call the FD.
And yes, most of the time an oxygen tank produces a higher concentration of O2 than you get from a concentrator, but not enough to matter. The one difference I really see that might be a factor is that if you have a fire, it might be a little easier to get the concentrator to quit putting out oxygen than the tank if the fire is near the O2 source. You could pull the plug on the concentrator, you could trip the circuit breaker, etc. With the oxygen tank, you probably have to get to the regulator. My guess is that the regulator is built to shut off at temps above some point, but I am just saying how *I* would build it, not how it's actually built. Engineers are generally smarter than I am, though, so it's a pretty good bet they thought of that.
Bottom line: you need to be just as cautious with concentrator-produced oxygen as you are with oxygen from a bottle.