Anyone know what the "Offset value" represents on a PB420E? I have the Tech manual which describes how to adjust it, but then refers to a description of Offset which is conspicuous in its absence. I would guess altitude adjustment, but by definition, I would think an auto unit wouldn't care so much ...

Thanks WAFlower!

My cpap flow was 9. I sat there and watched the tech set it up, so I know how to make changes, and will try what you suggested. I'll also try putting the gasket on the chamber first.

Thanks again.

Just got a GoodKnight 420E, replacing my CPAP Remstar after 2 years. First caution: My 420E came with the humidification module. The APAP connects to the H20 container with a small tubuler gasket. On my unit, no matter how the gasket was oriented or pressed into place, it allowed a serious leak. I e...

Nighthawk, I have a question. From where do you rent an oximeter?
A provider loaned me one for a couple nights a couple years ago, but I didn't put it to best use; didn't know then what I know now.