bill-e, what mask do you use?

Yes I've been looking at the Z1 & Transcend waterless humidifiers, but they won't work with my current mask. (may need to change mask with my travel cpap)

And, yes I know I don't need a humidifying option when I travel to a humid local.

My home machine is a Resmed S9 & Swift FX mask, works great. I have a Transcend auto for travel. I really like it, with just 2 issues. (humidification, & whine noise) I've used CPAP for about 5 years, always with the same mask (swift FX nasal pillows). I suspect some of the whine noise with the Tran...