CAIRE AirSep FreeStyle 5 Patient Manual page 224

FreeStyle 5™
Do not operate FreeStyle 5 without the air intake filter in place. If
a second filter is provided, insert the "replacement" filter before
you clean the dirty filter.
Use only AirSep Part No. FI194-1 for air intake filter for this unit.
MN167-1 rev. D
Figure 15: Removal of Filter from
Filter Cover
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