The Pre-Inlet Filter slides into the blue chamber on the top of the Clear Inlet Filter on all Millennium Oxygen Concentrators. For best performance the Pre-Inlet Filter should be cleaned monthly, using mild soap and water, and left to air dry completely before re-insertion into the Clear Inlet Filter. Replace as necessary when the Pre-Inlet Filter foam begins to appear worn or degraded.
IF USING WITH 10L MUST USE SILENCER (HEA 1014672)
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