ResMed AirFit N20 User Manual page 10

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.
Disassembly
If the mask is connected to your device, disconnect the device air tubing
from the short tube.
1. Undo the fastening tabs on the upper headgear straps. Pull the straps
out of the frame.
Tip: Keep the magnetic clips attached to the lower headgear straps to
easily distinguish the upper and lower straps when reassembling.
2. Remove the elbow from the mask by pressing the side button and
pulling the elbow away.
3. Hold the frame by placing your thumb over the side slot. Pull the
cushion away from the frame.
4