Ray - I wish would have gone with Apria, as they are a larger company. Mine is Preferred Homecare and they are focused southwest. The refill gets a little complicated across companies as it is a prescription.
However - OZZ - the machine you show actually will run on 12V as well. Thanks for pointing that out, as I started asking the questions and my rep came up with another version of a 12V portable called Open-Aire Inogen One
http://www.open-aire.com/inogenone.html This one is similar but smaller. It will run for a while on battery, but also runs continuously on 110VAC or 12VDC. I can even take it in the boat (if only I could get a hose long enough to waterski!
) They will provide it to me for travel whenever they have some available. I will have one for our vacation north next week.
Kind of ironic - lighting all those cigarettes through the car cigarette lighter and now it's used to power the lung.