Probably done so for thirty years.
I've been trying out a new top of the line Respironics machine with heated tube
I'm lucky. The machine is working wonders and I'm doing even better with a fixed air pressure. Down to 4 wake ups a night.
I've also bought a second hand REMstar Pro C-Flex + with a standard humidifier for a very good price
What I want to know is:
Can I upgrade the humidifier lid? I already have an 80w power supply.