Ok kind people I am thinking outside the box a little here.
Currently I do not need to use oxygen but during the summer here it gets very very hot and consequently the perceived level of oxygen is diluted (could be my imagination but it always seems a lot harder to get enough when the temperature is around 42 or 43C). During the day this is not so bad as there is always air-conditioning working wherever you are. At night the situation changes because the AC dries the air to such an extent that breathing becomes difficult as mouth and nose and throat dry up and you continually have to fix the issue or stop breathing so AC switched off high heat (32 to 35C through the night) and again very hot thin air with lower oxygen levels.
So my question (finally) what is the general consensus about using an oxygen concentrator to provide oxygen to supplement that which would normally be available. I know there would be safety issues around the increased oxygen levels but that aside do you think turning your bedroom into an oxygen rich room would work? Please feel free to call me an idiot if needs be