Why it matters
The Alen BreatheSmart 25i is a HEPA room unit air purifier that its maker rates for 800 sq ft.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 800-square-foot rating implies about 512 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 21 times an hour.
Filtration: HEPA.
Price-wise it sat in the middle third of the 74 hepa room unit models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Air Purifiers for Allergies, Best Air Purifiers for Kitchens, Best Smart Air Purifiers With App Control, where it is ranked against every model that meets the same rule.
Its rated room size of 800 square feet is below the middle of the range we cover: 61 of the 152 purifiers with a stated figure come in lower, and the range runs from 62 square feet to 4,800 square feet.
Compared with the Alen BreatheSmart 45i: rated room size 800 sq ft here vs 1,900 sq ft.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 800 sq ft
- Allergy season
Look elsewhere if
- Whole-home filtration on its own
- Removing gases without a substantial carbon stage
Pros and cons
Pros
- Rated for 800 sq ft
Cons
- Filters are an ongoing cost
- Size to the room at 4.8 air changes per hour
Limitations to weigh
- Specifications are the maker's or seller's own figures; check fit against your equipment's model number and the actual size.
Specifications
The bracket shows where each figure comes from.
| Price | $179 | Maker |
|---|---|---|
| Room coverage | 800 sq ft | Maker |
| Filter type | HEPA | Maker |
Alternatives worth comparing
More air purifiers we cover
- Blueair DustMagnet 5440i $319.99
- Winix 5520 Air Purifier
- Honeyuan ZY1886S Air Purifier
- Airpura V700/V714 Air Purifier (V700-WHT) $1,149.98
- Coway Airmega 100 $129.99
All air purifiers, compared in one table · Every Alen product we cover
Final verdict
A practical choice for rooms up to about 800 sq ft. Confirm the model it fits before ordering.
Where to buy
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