Home › Large (250–399 CADR) › Blueair Blue Pure 311i Max
Blueair Blue Pure 311i Max
#4 of 18 in large · #9 of 49 overall · all Blueair models
3.7
Medium-room Blueair with very low power draw and app.
250 cfmsmoke CADR
388 sq ftAHAM room size
50 dBat full speed
36 Wmax power
$170street price, being verified
One air change of a 300 sq ft room in about 10 min$120 a year in filters$770 to own for 5 yearsAHAM Verifide CADR
Ratings
Includes independent measurements from HouseFresh.
Each rating places this unit among the others on a 0.5–5 scale, within its room-size class for the measures that scale with size and across the whole catalog for the rest. Weighted together they give the overall 3.7. Formula and weights.
Specifications
- Smoke CADR
- 250 cfm
- Dust CADR
- 321 cfm
- Pollen CADR
- 250 cfm
- AHAM room size
- 388 sq ft
- Maker's room size
- 387 sq ft
- Max power
- 36 W
- Noise (low / high)
- 23 / 50 dB
- Filter cost
- $60
- Filter life
- 6 months
- Filters per year
- $120
- 5-year cost of ownership
- $770
- True HEPA
- Yes
- Activated carbon
- 0.2 lb
- Auto mode (PM2.5 sensor)
- Yes
- App
- Yes
- Washable prefilter
- Yes
- AHAM Verifide
- Yes
- Energy Star
- Yes
- Weight
- 8.0 lb
- Released
- 2023
Independent measurements
| Metric | Value | Source |
|---|---|---|
| Time to clear test room 728 cu ft test room; incense smoke cleared to PM1 zero (100%); top speed (3 of 3). 32 min at speed 2; 54 min at speed 1 | 27 min | HouseFresh 2026-02 |
| Measured CADR HouseFresh estimated PM1 CADR from 728 cu ft decay test at top speed; not an AHAM lab test. 185 cfm at speed 2; 108 cfm at sub-45 dBA setting | 220 cfm | HouseFresh 2026-02 |
| Measured CADR, % of rated 220 cfm HouseFresh PM1 CADR vs 250 cfm catalog rated smoke CADR. Note HouseFresh cites AHAM dust CADR as 321 cfm | 88 % | HouseFresh 2026-02 |
| Noise, measured speed 1 of 3 (lowest); 3 ft; sleep mode 34.9 dBA | 37 dBA | HouseFresh 2026-02 |
| Noise, measured speed 3 of 3 (top); 3 ft | 57.7 dBA | HouseFresh 2026-02 |
| Power draw, measured speed 3 of 3 (top) | 29.2 W | HouseFresh 2026-02 |
How it compares with its neighbors
| # | Model | Smoke CADR | Dust | Pollen | W | dB max | Filters/yr | $/CADR | Score |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Dreo Macro Pro | 258 | 260 | 258 | 40 | 53 | $100 | 0.5 | 4.1 |
| 2 | Levoit Core 400S | 260 | 242 | 250 | 38 | 52 | $100 | 0.7 | 3.8 |
| 3 | Blueair Blue Pure 311 Auto | 250 | 250 | 250 | 30 | 50 | $120 | 0.8 | 3.7 |
| 4 | Blueair Blue Pure 311i Max | 250 | 321 | 250 | 36 | 50 | $120 | 0.7 | 3.7 |
| 5 | Levoit EverestAir | 360 | 340 | 350 | 49 | 52 | $160 | 1.1 | 3.7 |
| 6 | Coway Airmega 300 | 300 | 300 | 300 | 57 | 52 | $110 | 0.9 | 3.6 |
| 7 | Coway Airmega 400 | 350 | 350 | 350 | 66 | 52 | $130 | 1.1 | 3.5 |
Head-to-head: Dreo Macro Pro vs Blueair Blue Pure 311i Max · Levoit Core 400S vs Blueair Blue Pure 311i Max · Blueair Blue Pure 311 Auto vs Blueair Blue Pure 311i Max · Blueair Blue Pure 311i Max vs Levoit EverestAir