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And replace the filter

That 360-degree filter drum contains approximately 270 cubic inches of adsorbent mediaa proprietary blend of activated carbon, zeolite (a molecular sieve thats particularly effective at capturing ammonia), and activated carbon impregnated with potassium iodide (specifically formulated to neutralize formaldehyde and other aldehydes from smoke)

(This comes from Association of Home Appliance Manufacturers, which certifies purifier performance, or via the CADR data used in Energy Star certification.) We then confirm by calculation that it can deliver at least four air changes per hour, or ACH, for the sizes of rooms its meant to operate in

This extra time allows the materials molecular chains to complete three crystallization rearrangements in the mold, with the cost being 15 fewer parts produced per cycle

Condition: minor surface scratches and oxidation commensurate with age