Why it matters
The Alen BreatheSmart 75i is a large-room / whole-floor air purifier that its maker rates for 2,800 sq ft.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 2,800-square-foot rating implies about 1,792 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 75 times an hour.
Filtration: HEPA.
Price-wise it sat in the middle third of the 57 large-room / whole-floor models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Air Purifiers for Large Living Rooms, Best Smart Air Purifiers With App Control, where it is ranked against every model that meets the same rule.
Its rated room size of 2,800 square feet is one of the largest ratings we cover: 142 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 35i: rated room size 2,800 sq ft here vs 1,400 sq ft; replacement interval every 10-12 months here vs every 6-9 months.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 2,800 sq ft
- Large open rooms
Look elsewhere if
- Whole-home filtration on its own
- Removing gases without a substantial carbon stage
Pros and cons
Pros
- Rated for 2,800 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 | $799 | Maker |
|---|---|---|
| Room coverage | 2,800 sq ft | Maker |
| Filter type | HEPA | Maker |
| Replacement interval | every 10-12 months | Maker |
Alternatives worth comparing
More air purifiers we cover
- Levoit Core Mini-P Air Purifier $43.99
- Honeywell HPA250B Air Purifier
- Azeus GL-FS32 Air Purifier
- Alen BreatheSmart 35i $289
- GermGuardian AC4825E HEPA Air Purifier Tower
All air purifiers, compared in one table · Every Alen product we cover
Final verdict
A sensible choice for rooms up to about 2,800 sq ft. Confirm the model it fits before ordering.
Where to buy
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