Blueair model comparison
Blue Pure 511 vs 511i Max vs Mini Max Auto
The plain Blue Pure 511, connected 511i Max and Blue Pure Mini Max Auto share compact cylindrical styling, but their room ratings and control routines differ. Compare the room at the same repeated-cleaning rate first, then decide whether you want a manually chosen fan speed, app access or automatic particle response. The model names are similar; the filters and documented functions are not interchangeable by assumption.
| Model | U.S. 4.8-ACH area | Control and sensing | Body H × W × D | Main filter identity |
|---|---|---|---|---|
| Blue Pure 511 | 189 ft² | One-button manual speeds; no sensor or app is documented | 13.4 × 7.9 × 7.9 in | Particle + Carbon cartridge; washable Arctic Trail sleeve |
| Blue Pure 511i Max | 237 ft² | Local buttons, app control and PM2.5-based Auto mode | 14.5 × 9.3 × 9.3 in | F5MAX family; exact base and specialty choices are separate replacements |
| Blue Pure Mini Max Auto | 105 ft² | Local PM2.5 Auto and color status; app connection is not documented for the Mini | 12 × 6.7 × 6.7 in | Particle + Carbon base cartridge; specialty fit remains unconfirmed |
Which room rating changes your answer?
If a closed room fits within 105 ft² at 4.8 ACH and you want the fan to react to particles, the Mini Max Auto makes the most sense of these three. If the room is larger than that but still fits the 511’s 189-ft² rating and you prefer a button-selected speed, the plain 511 is the manual choice. If the room needs the 511i Max’s 237-ft² rating, or you require phone access and Auto mode, the connected 511i Max is the better fit. Above 237 ft² at this rate, compare a larger purifier rather than replacing the rate-specific figure with a one-hour headline.
Automation is not the same as an app
The base 511 is direct control: Night, Everyday and Boost cycle from the one button, and the model page explicitly says it has no integrated air sensor. The Mini Max Auto can respond locally to its PM2.5 sensor, but the exact U.S. support material says the Mini family does not connect to the app. The 511i Max adds app functions and PM2.5-driven Auto mode while retaining physical controls. None of these descriptions means that a purifier measures every gas or odor; a particle sensor and activated-carbon filter do different jobs.
Finally, check the replacement cartridge by the exact model name. The 511’s exact filter page limits its Particle + Carbon cartridge to Blue Pure 511. The 511i Max has a separate F5MAX family, while the Mini Max Auto replacement page does not spell out Auto in its compatibility sentence. Do not buy a filter on family styling alone. Read the full reviews for the Blue Pure 511, 511i Max and Mini Max Auto before choosing the controls and routine that match your room.
Sources: Blueair’s exact U.S. product pages, manuals, filter pages and U.S. Mini support article for the three linked models. Published room areas are manufacturer specifications at 4.8 ACH, not independent tests; shell measurements do not include clearance space.