Blueair Blue Pure 311 Auto
The Blueair Blue Pure 311 Auto delivers verified AHAM CADR performance (250 Smoke / 250 Dust) for rooms up to 388 sq ft. Featuring multi-stage H13 True HEPA and active odor adsorption.
3-Year True Cost of Ownership Model
AHAM AC-1 verified room air filtration throughput for fine particulate and smoke reduction.
Acoustically evaluated across whisper-quiet sleep mode and maximum turbo airflow settings.
Sized for 4.8 air changes per hour (ACH) in designated living room and bedroom layouts.
Total routine scheduled replacement filter expense projected over continuous operation.
- Certified 250 Smoke CADR rating
- Whisper-quiet sleep mode (23)
- Energy Star low power consumption
- Real-time air quality sensor
- Replacement filter required every 6 to 12 months
- Coverage capped at 388 sq ft
Verified Engineering Specifications
| Nominal Dimensions | Round / Custom Cartridge | Actual Dimensions | Integrated Machine Unit |
|---|---|---|---|
| Filter Depth | Standalone Unit | Media Construction | H13 True HEPA & Granular Carbon |
| Initial Resistance | Integrated Variable Multi-Speed Blower | Airflow Capacity | 388 sq ft @ 4.8 ACH (930 sq ft @ 2 ACH) |
| Smoke CADR | 250 CFM | Dust / Pollen CADR | 250 / 244 CFM |
| Acoustic Noise | 23 – 53 dB | Rated Room Coverage | 388 sq ft @ 4.8 ACH (930 sq ft @ 2 ACH) |
| Replacement Filter Cost | $49.99 | Replacement Interval | Every 6 Months |
| Annual Consumable Cost | $99.98/yr | Compatible Equipment | Blueair 311 Auto System |
Our Take on the Blueair Blue Pure 311 Auto
An exceptionally reliable room air purifier with whisper-quiet operation (23 min noise) and proven particle removal.
Filtration Performance Note
Traps 99.97% of particles down to 0.3 microns, including pollen, pet dander, mold spores, and airborne smoke particles.
Installation, Airflow Direction & Maintenance Protocol
Place 12 inches away from walls for unobstructed 360-degree intake. Replace HEPA filter when indicator light illuminates.
Common Questions About the Blueair Blue Pure 311 Auto
What size room can the Blueair Blue Pure 311 Auto handle?
It is certified for rooms up to 388 sq ft, completing roughly 5 air changes per hour in spaces of that volume.
How noisy is this purifier on low speed?
On its lowest setting, sound levels drop to 23, which is quieter than a gentle whisper.
How much do replacement filters cost for the 311 Auto?
Official Blue Pure 311 Particle+Carbon replacement filters typically cost between $30 and $45 per cycle.
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Coway Airmega AP-1512HH Mighty Air Purifier
When to choose: Comparable medium-room air purifier alternative.
Levoit Core 400S Smart Air Purifier
When to choose: Alternative medium-room air purifier with similar CADR profile.