First, CPAP is not what people need. Most people need AutoPAP. This is a machine
that adjusts pressure as you sleep. It allows for both inhalation and exhalation. Breathing
out against a constant pressure can make normal breathing difficult.
Second, the there are three different pressure settings on an AutoPAP machine that the
user is going to need to experiment with: 1) minimum pressure 2) maximum pressure and
3) the ramp-up pressure and time of the ramp-up. Most machines have adjustments for
your elevation above sea level.
Third, in a dry climate, humidity and air temp are also important.
Fourth, the mask is just as important as the machine. Proper fit and comfort are critical to
Fifth, making your setup work for you by arranging the tubing and supporting your head properly
are very important to good compliance (see attached photos of my home setup). I use two pillows
(feather) and a buckwheat filled pillow under my neck. This allows me to turn side to side without
knocking off my mask. Tubing has a cloth sock to prevent cold air condensation and prevent snagging
on the sheets and pillows. Tubing is also suspended so I can turn with getting tangled.
Two machines that are very good AutoPAP devices, but their cost are quite different. I
recommend either one. Resmed S9 Autoset or Devilbiss IntelliPAP Autoadjust Flex