Blueair Blue Pure 311i Max
#3 in Large roomsFull review
A mid-size, efficient purifier with app control for bedrooms and living rooms up to about 440 sq ft.
Amazon $229$229
3.7/5
A living-room purifier with strong airflow and low filter costs at Amazon’s price. Turn PlasmaWave off if you’re sensitive to ozone.
- 253 cfmSmoke CADR
- 392 sq ftRoom size
- $47.49/yearFilters
- 23.5 dBNoise
- 2 yearsWarranty
Check price at Amazon$179.99
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cleans a large bedroom or living room quickly
- Filters cost about $50 a year
- Auto mode, app and Alexa control
Cons
- PlasmaWave ionizer makes a little ozone, though you can turn it off
- Not ENERGY STAR certified
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its room size. How we rank explains each one.
Specifications
| Model number | 5520 |
|---|---|
| Performance | |
| Smoke CADR | 253 cfm |
| Dust CADR | 252 cfm |
| Pollen CADR | 247 cfm |
| PM2.5 CADR | 252 cfm |
| CADR certified by | AHAM Verifide |
| Room size (AHAM) | 392 sq ft |
| Coverage (maker) | 1,882 sq ft |
| Noise | 23.5 dB |
| Efficiency | |
| Efficiency (IEF) | 4.6 cfm/W |
| ENERGY STAR | No |
| Energy use | 323 kWh/year |
| Power at top speed | 65 W |
| Filters | |
| Filter | HEPA |
| Activated carbon | Yes |
| Replacement | Filter Q (1712-0123-00) |
| Replacement cost | $47.49 every 12 months |
| Yearly filter cost | $47.49/year |
| Ionizer | Yes, can be switched off |
| CARB certified (ozone) | Yes |
| Controls and build | |
| Air-quality sensor | particle (dual sensors) |
| Auto mode | Yes |
| Wi-Fi app | Yes |
| Fan speeds | 5 |
| Dimensions | 22.17 x 13.59 x 8.27 in |
| Weight | 13.3 lb |
| Warranty | 2 years |
Alternatives in this room size
Dreo Macro Max AS
#4 in Large roomsFull review
A strong-value smart purifier for large rooms up to about 450 sq ft.
Amazon $159.99$159.99
Blueair Blue Pure 211i Max
#6 in Large roomsFull review
A large-room purifier with very high certified CADR and low running costs, for open-plan living areas.
Amazon $349$349
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