Den, Thanks for the info. Some air would leak occasionally from moving in bed, but not often. All I know is that after several nights of trying, it's obvious to me that I'm sleeping a lot better and not tired during the day anymore now that I lowered the pressure from 14 to 12. I wasn't aware of dat...

Thanks! Was able to download clinical manual and it worked great! Slept a lot better last night. The doc keeps on raising the pressure. I tried the 14 he set for a month and was not sleeping well. I was sleeping great at 12 but he wanted to change it. After the change I was drifting off at work, fe...

Can anyone tell me how to change the pressure settings on the HC604. I didn't get a clinical manual and need to lower the settings. Please help!