Fish 'n ' Grits wrote:
Check out the Inogen One.It's a small battery-operated concentrator. I've been using mine over two years with no problems at all. I don't leave pilot lights on anyway (too many years on boats), so I never give the propane a thought. I have Medicare and a supplement, so there was no cost to me. Get the double batteries, it comes with 12Vdc and 115vac chargers. I think you'll be pleased. Except as a satisfied user, I have no connection with this company. BTW, the flame for your frig is outside.
A friend has one that works great and we checked on one for my wife who like me uses CPAP. The Inogen is a demand type unit - that is it provides oxygen when it senses you taking a breath. According to Inogen it can't used with a CPAP machine because it doesn't provide a steady supply of oxygen at a specific pressure.