How large a room will the 75i clean?

Alen rates it for up to 1,400 square feet, which suits open living areas. Smaller bedrooms will clean faster at lower fan speeds.

How often does the filter need replacing?

Alen rates the included filter for roughly 12 to 15 months of typical use. The filter-life indicator tells you when to change it.

Yes on low and sleep settings, where owners describe it as barely audible. At maximum speed it is clearly noticeable.

The true HEPA filter captures particles; odor and smoke removal depends on the filter model you choose, and a carbon-blend filter helps more.

It is the only new price listed as of November 7, 2026, at ALEN. Check the price history for dips before buying.

At ALEN, for $868.00, as of our latest check.

$868.00at ALENObserved at 10:42 PM

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