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A five-pack of replacement HEPA filters for the Alen BreatheSmart 35i air purifier. Each filter is a single cartridge that combines a HEPA layer with a carbon layer for particles and odors, and Alen rates it for roughly 12 months of use per filter. At $293 at ALEN as of November 7, 2026, the pack works out to about $59 per filter, which is the only new price listed and the lowest seen recently for the five-pack.
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Store links may earn us a commission. Price via Klarna.
Lowest price we've seen: $293.00 on Nov 8 at ALEN. Tracked across 1 store since Nov 8.
