Thanks everyone. I have been now able to find information on the upgrade. I hope this solves the problem.

H3I is what came with the machine. Yes, it is turned all the way up right now. I have tried experimenting on different settings. My ENT, wants the humidifier on higher settings in the winter due to sinus issues and indoor allergies. I am using the full face quattro. Been using the quattro for many y...

After using a Fisher and Paykel HC series for almost 10yrs I am now using a ResMed S8. I never had any problems with humidification with the Fisher and Paykel. I am now having issues with the new ResMed not being able to provide enough humidification throughout the night. I am awakening after about ...