Epson V11H071920 - PowerLite 9300i SXGA+ LCD Projector Product Support Bulletin page 9

2) Air intake filters (2)--located at bottom of projector:
Use a computer vacuum to clean both filters. If you don't have one, then use a soft brush and gently
clean the filters. If the dirt is difficult to remove or either filter is damaged or broken, replace the
filter(s).
Note:
Both filters should be replaced when the lamp is replaced.
3) Power supply intake filter (located on side of projector—opposite handle side)
Use a computer vacuum to clean dust from the filter and vents.
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PSB.2005.06.001