The reference versions, for anyone who would rather read than ask: How to Read Your CPAP Data: A Plain-English Guide to AHI, Leak Rate & Pressure — the whole page, in the order above. CPAP Leak Rate: What's Acceptable and How to Fix High Leaks — step 1, and the one that decides whether the rest is worth reading. One thing this board will not do: nobody here will tell you what to set your machine to. What a chart read gets you is a clear description of what is happening and when — which is what makes an appointment productive. Nothing on SomniTalk is medical advice. Talk to your own clinician before changing therapy.