Why it matters
The Blueair Blue Signature Replacement Filter is a maker-original filter for the Blueair Blue Pure 511.
Made for Blueair's Blue Signature purifiers. The model label is usually on the back or under the filter door; match it before ordering.
Construction: HEPASilent.
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 Blueair Blue Pure 511, which its maker lists as rated for 189 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
- Blueair Blue Pure 511 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 | $99.99 | Maker |
|---|---|---|
| Filter type | HEPASilent | Maker |
Alternatives worth comparing
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- Honeywell Filter H Replacement Filter
- Coway Airmega 100 Filter $39.99
- Coway Airmega Mighty AP-1512HH & 200M Filter Set $59.79
All air purifier replacement filters, compared in one table · Every Blueair product we cover
Final verdict
A sensible choice for blueair Blue Pure 511 owners. Confirm the model it fits before ordering.
Where to buy
Each button opens this exact model. Disclosure