He has a Resmed S9 auto and the H5i humidifier. He has had these for about 2 years and loves it and has done well.
Very recently the humidifier is using water very quickly--it has never done this before. He has always been able to fill the chamber and have it last about 3 nights--now he can only do one night and there is very little water left.
He does use only distilled water and has not changed any of his settings. He only fills the chamber outside of the unit per instructions and has never had a spill in the unit.
There doesn't appear to be a leak because everything--the hose, the unit, etc. is completely dry. He has not noticed any change in the function.
We do live in Arizona and it has become much warmer recently. However that did not appear to have any effect last year so I doubt this has anything to do with it.
I appreciate any thoughts/help you can offer. I hope I have provided enough info.