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Filters › Blueair Blue Pure 311i+ Max
Blueair Blue Pure 311i+ Max replacement filter
The Blueair Blue Pure 311i+ Max takes the Blue Pure 311i+ Max Particle + Carbon Filter. It costs $49.99 at Blueair's store and lasts up to 9 months, which works out to about $67 a year in filters.
The numbers
| Filter | Blue Pure 311i+ Max Particle + Carbon Filter |
|---|---|
| Price at Blueair's store | $49.99 |
| Lasts | up to 9 months |
| Filters per year | $67 |
| Electricity per year (est.) | $23 |
| Total running cost per year (est.) | $89 |
| Five years of filters | $333, against $225 for the purifier |
Filter price and replacement schedule are Blueair's own, checked 2026-10-01. Yearly figures are our calculation from them; electricity assumes 24/7 use at a typical fan speed and $0.17/kWh.
How it compares
Its yearly filter cost ranks 9 of 23 purifiers we track (1 is cheapest). Against other purifiers for large rooms:
| Purifier | Filter | Per year |
|---|---|---|
| Blueair Blue Pure 311i+ Max | $49.99 | $67 |
| Blueair Blue Signature (Medium) | $69.99 | $70 |
| Blueair Blue Pure 211i Max | $69.99 | $93 |
| Blueair Blue Signature (Large) | $99.99 | $100 |
| Levoit Core 600S-P | $59.99 | $120 |
| Coway Airmega 400 | $129 | $129 |
| Levoit EverestAir-P | $99.99 | $200 |
Other filters Blueair sells for the Blue Pure 311i+ Max
Besides the standard filter, Blueair lists these 3 for the Blue Pure 311i+ Max. The type is Blueair's own description of what the filter is for; we have not tested any of them, and the purifier's published CADR is for its standard filter.
| Type | Filter | Price | vs. standard | Why it's listed for this purifier | |
|---|---|---|---|---|---|
| Smoke | Blueair Blue Pure 311i+ Max Smokeblock Filter | $64.99 checked 2026-10-11 | +$15 | Blueair's listing names it: “Blue Pure 311i+ Max Smokeblock Filter” (source, confirmed 2026-10-11) | |
| Allergen | Blueair Blue Pure 311i+ Max Allergenblock Filter | $69.99 checked 2026-10-11 | +$20 | Blueair's listing names it: “Blue Pure 311i+ Max Allergenblock Filter” (source, confirmed 2026-10-11) | |
| Pre-filter | Blueair Blue Pure 311i+ Max Pre-Filter | $11.99 checked 2026-10-11 | — | Blueair's listing names it: “Blue Pure 311i+ Max Pre-Filter” (source, confirmed 2026-10-11) |
Prices are from Blueair's store. The yearly cost above uses the standard filter; a dearer filter replaced on the same schedule raises it in proportion. A pre-filter is the outer layer that catches hair and large dust before the main filter.
When to replace it
- Follow the purifier's filter indicator rather than the calendar: it tracks actual use, and the brand's schedule is a maximum under normal conditions.
- Wildfire smoke, heavy cooking, pets and dusty rooms shorten a filter's life. A filter that looks grey or carries a smell is due even if the light hasn't come on.
- Third-party filters are cheaper, but the brand's performance figures only apply with its own filter, and on some purifiers the filter-life tracking only works with genuine ones.
See the full specs for the Blueair Blue Pure 311i+ Max, the cheapest purifiers to run, or every purifier's filter cost.