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The Alen BreatheSmart 25i is a compact HEPA air purifier for bedrooms, nurseries, dorms and home offices. Alen rates it for up to 800 sq ft once per hour or 400 sq ft every 30 minutes, with 99.9% particle capture and a choice of Essential, Advanced or Ultimate filters. It adds app control, scheduling, filter-status tracking and an Auto Light Mode that dims the panel in the dark. The best new price is $189 at Ace Air Purifiers as of November 7, 2026, with two stores listing it new.
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Lowest price we've seen: $189.00 on Nov 8 at Ace Air Purifiers. Tracked across 2 stores since Nov 8.
Owner feedback on the BreatheSmart 25i centers on quiet nighttime operation and easy filter changes. Some owners question the coverage rating and the cost of replacement filters.
Alen BreatheSmart 25i HEPA Air Purifier
Compact air purification for bedrooms, nurseries, dorms and home offices. Alen rates coverage at up to 800 sq ft once per hour or 400 sq ft every 30 minutes.
Filter choices: Essential, Advanced and Ultimate. Select the option suited to your air-quality concerns.
Filtration: Alen reports capture of 99.9% of airborne particles.
App control: Remote control, scheduling and filter status through the Alen Air app.
Lighting: Auto Light Mode dims control-panel lights in low-light environments.
Replacement filters: Use genuine BreatheSmart 25i filters; filters for other Alen models are not interchangeable.
Manufacturer warranty: Alen’s Forever Guarantee is subject to its registration, filter-replacement and eligibility terms; consult Alen’s current policy.