Change Pressure on a Different CPAP

Hi. I have used the same CPAP machine for about 20 year and it has worked amazingly well. It finally died last night and, luckily, I have my father's old CPAP machine, but it is not set for me. I found a manual online that tells how to change the pressure settings, but that is not my problem. I know that my old machine was set at 9 atmospheres of pressure. Unfortunately, the new machine lists pressure available as between 4.0 and 20.0 cm H2O. Also using an online calculator I found that 9 atmospheres = 9297 cm H2O, so that is absolutely no help. Can anyone help to provide the proper number so I can use this?

Set it to 9 on the new machine.

Zurls: Your original machine was set on 9cm H20 pressure which is 9 mBar. 1 Atm ~ 1013mBar. All cpap machines go upto a max of 30cm h20.

To have 9 atm pressure, you need to be diving under 90meters of water. Try blowing bubbles 25cm below water (25cm h20 pressure) and compare it to breathing against your cpap machine.

Zurls wrote:I know that my old machine was set at 9 atmospheres of pressure.

9 atmospheres would cause you to explode like a popped balloon.

red gooey stuff ALL over, walls, floor, ceiling, in the vents.. kind of like that scene in Scanners.


well, ok, to be fair, it'd probably be your chest that blew up.