If you start the pressure at 5 or 6, and you actually need 11, it will take several minutes to get there. It does NOT know that you need 11. And it won't remember what you needed 5 minutes ago or last night. It will go a little, check, go up a little, check, etc. until it gets high enough. Meanwhile, you are having multiple events.xxyzx wrote: the auto setting will adjust to the MINIMUM pressure NEEDED
setting the lower number to a bigger one ensures that more pressure is used than is needed
Then, it goes back down until it needs to go up again. So, you have multiple clusters of events as it slowly goes up. And you have a lot of up and down pressure which boths some people.
It is FAR better to have the pressure start at a pressure that will prevent MOST events without having to go up. The purpose of a pressure range is to allow it to go up when needed if ther are times when you need more pressure such as sleeping on your back or REM Sleep.
For example, most of the night my pressure stays at about 11-12. If I roll onto my back, my pressure may spike to 15, or rarely up to 17. But as soon as it goes up, I roll back onto my side, and the pressure will go back down without me waking up. If I were to set my machine for 5-17 instead of 11-17, I would have tons of events, and not be well treated at all.
Keep in mind that the auto machines monitor your airflow, but they don't retain any info long term. They don't remember what need. They go up slowly and keep stopping to test. They don't just go to where you need it. If you want *that*, you have to program it to go there. A wide open auto machine is a prescription for failure for most people.