Welcome. This thread is the front door. You do not have to write much. Four lines is plenty: What you sleep on — machine make and model (e.g. "ResMed AirSense 11 AutoSet", "Philips DreamStation 2", "Löwenstein prisma smart", "Luna G3X"). No serial numbers, please — they identify your device to anyone reading. Mask — nasal, pillows, or full face, and which one. How long you have been on therapy — one week and fifteen years are equally welcome. What you want from this place — help with a number you don't understand, a mask that leaks, someone to compare notes with, or just somewhere to lurk quietly. A few house habits that make this board work: We talk about data and experience. We do not diagnose each other, and nobody here can tell you what your pressure should be — that is between you and your clinician. Please keep other people's information out of your posts: no names, no clinic letters, no photographs of paperwork. Disagreement is fine. Contempt is not. If you are brand new to CPAP, the New to CPAP category is the gentler room, and the Library holds the reference articles. Have a look around, then say hello here. Nothing on SomniTalk is medical advice. Talk to your own clinician before changing therapy.