SeriouslyExhausted, welcome to the forum. I'm sorry you've had such a hard time. I can't speak to your specific question on the basis of temperature and humidity, but I wanted to post because it sounds like you are having serious issues with your machine. It is normal to take some time to adjust to the machine and humidity settings, and maybe get some "rainout" in your mask from condensation issues, but "spitting" water or having "blazing hot air streaming into my mask with the reservoir completely dry and the machine hot to the touch" can't be normal. Have you called the DME or whomever set you up with your machine? if not, call them tomorrow and tell them exactly what you told us, and insist that they replace the machine.
While you're at it, at a minimum, also call your doctor tomorrow to tell them to send the DME a new script for a machine that lets you view your AHI, leak rate, and other data! See robysue's post on this thread newbie-t29231.html?hilit=escape#p191961
for a good description. Should you wish to take an active role in your therapy it will be helpful to be able to view your data yourself. And it will help if you start noticing a trend in how you're feeling, you can look at the data and see if you see a trend in the data too. If you don't care to view your data, you have lost nothing.
Even better, ask your doctor to give them a new script for an Auto machine that automatically adjusts to the pressure you need. (ALSO with the ability for you to view AHI, leak, etc.) It can be run as a straight CPAP, but if your needs change it will adjust automatically. If all you need is straight CPAP pressure, then again you have lost nothing. This is why the forum advises against the Escape; it only records hours of usage. Just think; if you had diabetes, would it be acceptable for the doctor to just find out how many injections you had done? Or for high blood pressure, to just ask how many times you had taken your BP at home? No, they would want more data in order to see how your therapy was going and make adjustments, and they would want you to be more active in your treatment. Same with OSA, however many docs and DMEs don't quite get it yet.
I just switched from CPAP to APAP and am glad I did! I hated the idea that every time I didn't feel right meant I would need another sleep study. And just over the first 3 days my pressures have been lower than even the lowest pressure the sleep center recommended after my last study. So if I hadn't switched I would have been still going along with too-high pressure for goodness knows how long. Seriously, ask your doctor to approve one; perhaps your "regulatory system problem" would be enough of a justification. I would tell him that I was worried that my other issues would mean that my needs could change unexpectedly, and having an Auto up front would compensate for any changes immediately. It also may be possible that you need a more sophisticated machine like a Bipap or ASV for your other respiratory issues, but from what I have read on the forums you have to try the other type first and move on if the CPAP/APAP is not working for you. (Another reason to get a machine that lets you see data!)
I know this seems like a lot, but remember, YOU are in charge of your therapy. You may need to take the doctor and DME by the hand and tell them what you expect. You are the patient; you are the client; you are paying them. So when I say "ask" your doctor, I mean ask, but be firm and don't take no for an answer. As you are less than a month in, that may make things easier, depending on your insurance. But don't delay!
Hang in there, and keep us posted.