Thanks tons for this knowledgeable post!
Suddenly the last week or two my CPAP therapy went to hell. AHI was 5x higher than normal. Getting terrible diaphragm muscle pains in the morning. Feeling tired. What the he!! happened? So I checked machine settings and saw EPR was on and set to 3. What the heck is EPR? So I Googled it and found this post.
Turned EPR off and slept like a baby last night. AHI is way way down Thank you.
Not sure how it got turned on, but glad its off now
