10
Then push the cushion clip over the cushion onto
the mask frame, ensuring it clicks into place in all
locations (Fig. 9).
3Thread the straps of the headgear through the slots
on the mask and fasten the Velcro. The headgear
label should face outwards and be near your neck
when fitted.
Mask
frame
Mask
cushion Cushion
clip
Figure: 9
MASK CHARACTERISTICS

MASK DEAD SPACE

Small mask 145 mL
Medium mask 200 mL
Large mask 230 mL
Note: These values were obtained using a facial profile
and measuring the volume from the surface of the
face to the end of the tapered fitting. The data is
provided as an indication only. Actual volumes may
vary depending on individual facial features.

MASK IMPEDANCE DATA

At a flow of 60 L/min the difference in pressure
between the end of the tapered fitting and inside the
mask is less than 0.5 cmH2O.

MASK LEAK

The leak from the mask, excluding leak between the
face and the mask, is less than 2.0 L/min at 30 cmH2O
(maximum pressure).