@miker8888 and all, I've used the Resmed Bi-pap now for a couple of years. I'm so in love with this thing for saving my life, I have very severe apnea with many events holding my breath for over 60 sec and such. I was having trouble breathing during the day while awake, realizing I wasn't breathing and had to take deep, full breath. sometimes it was tough to even breathe; Now, I breathe well all day. The bi-pap pushes air into my nose and helps me breathe out as well. So, I am reminded tp breathe in and out; My autonomic systems aren't working well in some ways. So, I suppose this little quiet machine is saving my life.

My secret find was the nasal cushion, like @miker8888, mentioned.I have a heated hose that warms the water making it much more comfortable for me since I sleep only with cool air and an overhead fan. Helps me with breathing. I'm claustrophobic so any other mask is total NO. Thank God this one was available last year. I don't need the chin strap as with the machine I usually close my mouth.

One problem I can't solve: my kitty sleeeps with me and is afraid of the hose, guess it looks like a snake??? and she can't stand the air that comes out near my nose. So, we have a different sleeping position now. Works. No husband so no issue there. This new machine is much smaller and very qyuet.

Oh, I made an investment in the SoClean machine for daily automatic cleaning. I love it. No more lung infections from not being able to clean the pieces well daily. Arthritis is bad and I can't do so well with my hands, so the additions machine is a wonder;

I hope this info helps and you have the best sleeps from now on. Blessings and enjoy better health...elizaeth