The Z1 and Resmed 10 uses multi voltage (100-240V) powerbricks. I use the Z1 with the battery pack plus AC inflight. Battery powered only on Airlines that would not let me plug it in. (JL KE)

Don't count on TSA IQ will know that frozen distilled water is a solid.

I use the humidity cannister with my Z1 in flight, while not a Resmed with water chamber and heated hose it is better than nothing as airline air is dry enough as it is.

I use nasal gel as well when I am not running water humidification. It is a water based lubricant for dry nose.

Out of courtesy when I plan to sleep with my CPAP inflight I take a window seat.

​​​​​​I keep the FAA certificate for my machine in a ziploc bag taped to the powerbrick.