I can't speak to the safety of putting hydrogen peroxide in your water. However, I do know that if you put vinegar in the water chamber, the top of the heater plate inside the water chamber will degrade. My father-in-law did this to clean his water chamber and it looked like a burn on the top plate ...

Your best bet is to contact ResMed to find the nearest service center to send it to. The blower does tend to whine and need replacement. This is not a do it yourself job because once the unit is opened, it needs to be recalibrated. This can only be done on ResMed's service software, which is why it ...

This model is prone to a whining noise caused by the blower. You can contact ResMed to find the closest place to send your unit. The dealers tend not to repair these units, so you'll need a service center.