ResMed AirFit N20 User Manual page 10

Headgear check:
Ensure that the ResMed logo on the headgear is facing outwards and
is upright when the headgear is put on.
3. Bring the lower straps below your ears, and attach the magnetic clip
to the frame.
4. Undo the fastening tabs on the upper headgear straps. Adjust the
straps evenly until the mask sits comfortably just over the nose.
Reattach the fastening tabs.
5. Undo the fastening tabs on the lower headgear straps. Adjust the
straps evenly until the mask is stable. Reattach the fastening tabs.
6. Connect the device air tubing to the short tube. Attach the elbow to
the mask by pressing the side buttons and pushing the elbow into the
mask, ensuring it clicks in on both sides.
7. Your mask and headgear should be positioned as shown in the
illustration.
Adjustment
If necessary, slightly adjust the position of the mask for the most
comfortable fit. Ensure that the cushion is not creased and the headgear
is not twisted.
1. Turn on your device so that it is blowing air.
Adjustment tips:

To resolve any leaks at the upper part of the mask, adjust the
upper headgear straps. For the lower part, adjust the lower
headgear straps. Adjust only enough for a comfortable seal.

The upper strap adjustment is the key to seal and comfort.

Do not overtighten the lower straps because they mainly serve to
keep the cushion in position.
Removal
1. Twist and pull both magnetic clips away from the frame.
2. Pull the mask away from your face and back over your head.
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