Mask fit v. major mask leakage

[SamStamport]

Mydreammapper reports mask fit and SleepyHead reports major mask leakage. Last night mask fit was 100% as it frequently does, but SleepyHead reported significant periods of major mask leakage.

What is the difference between the two?

Should I be concerned about SleepyHead's major mask leakage?

Thanks!

[justMongo]

Mydreammapper reports mask fit and SleepyHead reports major mask leakage. Last night mask fit was 100% as it frequently does, but SleepyHead reported significant periods of major mask leakage. That's because the mask fit is more "forgiving" of leak.

What is the difference between the two? See above.

Should I be concerned about SleepyHead's major mask leakage? We would have to see the leakage numbers and/or graph. You may be leaking by opening your mouth since you are using a nasal mask.

I'll ask that this be moved from software support to the main forum.