Oops--hrs are 11,650

It has 4.5 years of service; I've been using it since June 2013.

My 4.5 year-old S8 Elite II (6500 hrs of use) has developed some annoying hi-pitched screeching noises, and although low volume, they do prevent me from falling asleep. I also get a distinct chirp each time I inhale. The noise is not continuous, but never goes away. It appears to be an air movement ...

Thanks for all the informative and caring responses. I'm going to enjoy monitoring and using this forum. FYI, I'm just back from seeing my sleep therapist. I have been loaned a ResMed Autoset II to use until Monday, at which time they will download the data and determine what pressure was successful...

I'm a new member of this forum, and feel lucky to have run across it. I've searched the site on several topics, and have already learned a lot. Here is my situation; I have successfully used a ResMed S8 Escape System, with their HumidAire3i humidifier, and a Mirage Vista nasal mask for three years. ...