Why it matters
The Alen BreatheSmart 45i & FLEX HEPA Filter is a maker-original filter for the Alen BreatheSmart 45i.
Made for Alen's BreatheSmart 45i & FLEX purifiers. The model label is usually on the back or under the filter door; match it before ordering.
Construction: HEPA.
Most purifier HEPA filters last six to twelve months in normal use; follow the unit's filter indicator and replace sooner in smoky or pet-heavy homes.
It fits the Alen BreatheSmart 45i, which its maker lists as rated for 1,900 sq ft. A unit that runs on high in a large room loads its filter faster than the same unit on low in a bedroom.
This is the particle stage: the pleated HEPA or HEPA-type media catches dust, pollen, dander and smoke particles, and it gets better at catching them as it loads, until the airflow drops. When the intake side turns gray or the fan sounds strained on its usual setting, it's due.
Use the filter made for your exact unit: purifier filters seal against their own housing, and a close-but-different filter lets air bypass the media.
Who it's for, and who should skip it
Good fit if
- Alen BreatheSmart 45i owners
- Keeping rated performance
Look elsewhere if
- Other purifier models
Pros and cons
Pros
- Maker-original part
Cons
- Only fits its own unit family
- A recurring cost of owning the purifier
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 | $69 | Maker |
|---|---|---|
| Filter type | HEPA | Maker |
Alternatives worth comparing
More air purifier replacement filters we cover
- Alen BreatheSmart 75i HEPA Filter $99
- IQAir HyperHEPA Replacement Filter
- VEVA Replacement Filter for GermGuardian FLT5000
- Honeywell HPA3000 Replacement Filter
- Levoit Vista 200 Replacement Filter
All air purifier replacement filters, compared in one table · Every Alen product we cover
Final verdict
A sensible choice for alen BreatheSmart 45i owners. Confirm the model it fits before ordering.
Where to buy
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