I just got a PR System One Auto 60 Series. My CPAP prescription calls for a pressure of 9.5. The APAP prescription reads 4-20. My machine is set to 4-20 and I am using it in APAP mode.
Over the first 6 days of use my 95% pressure is between 10 and 11 according to Sleepyhead.
I dont fully understand why having a smaller range set is better. Can't I keep my machine at 4-20? Doesn't the APAP algorithm determine what pressure I need at all times? What are the advantages to having a smaller range?