Air Purifiers · Head-to-head
Blueair Blue Pure 211i Max vs Coway Airmega Mighty2 AP-1512N
The short answer
Coway Airmega Mighty2 AP-1512N comes out ahead overall with 8.0/10 against 7.4/10 for the Blueair Blue Pure 211i Max. Blueair Blue Pure 211i Max is stronger on cleaning performance for bedroom size. Coway Airmega Mighty2 AP-1512N is stronger on noise at sleep-usable speeds, indoor-air safety & materials, running cost & ownership and value. At current verified prices, the Coway Airmega Mighty2 AP-1512N costs about $40.00 less.
- Choose the Blueair Blue Pure 211i Max if: Owners of a large primary suite who want high CADR at night without an always-on ionizer, for about $90 less than the SP4i.
- Choose the Coway Airmega Mighty2 AP-1512N if: Most people with a 150–400 sq ft bedroom who want the most clean air at a sleep-tolerable noise level, with no ionizer and no need for an app.
Scores by criterion
| Criterion | Blueair Blue Pure 211i Max | Coway Airmega Mighty2 AP-1512N |
|---|---|---|
| Noise at sleep-usable speeds | 7.3RTINGS snippet: 33.9 dBA on low; no measured airflow below 45 dB. | 8.6HouseFresh: 35.9 dBA in Sleep mode and 151 cfm at 42.6 dBA on speed 2. |
| Cleaning performance for bedroom size | 8.5435 smoke CADR rated. | 7.5About 151 cfm at quiet speed 2 (99 cfm on speed 1); 260 cfm only at a loud 56.9 dBA. |
| Sleep-friendly features | 8.0Night mode with dimmed lights, auto, app. | 7.8Sleep mode and light sensor, but Smart mode forces sleep in the dark, the buttons are unlit and there is no app. |
| Indoor-air safety & materials | 7.0Zero-ozone verified and CARB; HEPASilent uses electrostatic charging. | 9.0No ionizer (HouseFresh); combined HEPA and carbon filter. |
| Running cost & ownership | 6.546 W; filters last about 9 months. | 7.0$69.99 yearly filter, but HouseFresh rates it the most expensive mid-size unit to own in year one ($415.07). |
| Value | 6.5$349. | 7.3$269.99 sold by Amazon; costs more but gives the most quiet airflow without an ionizer. |
Specifications
| Spec | Blueair Blue Pure 211i Max | Coway Airmega Mighty2 AP-1512N |
|---|---|---|
| Exact model / SKU | — | AP-1512N |
| Workflow type | Extra Large Room | Standard Room |
| Lowest-speed noise (manufacturer) | 23 dB | 19 dB |
| Independent PM1 CADR at maximum | — | 237 CFM |
| Top-speed noise (manufacturer) | 53 dB | 50 dB |
| Independent PM1 CADR at low-noise setting | — | 165 CFM |
| Lowest-speed noise (independent measurement) | 33.9 dBA | 35.9 dBA |
| Quiet-test threshold | — | ≤45 dBA |
| CADR (smoke where given, else headline) | 435 cfm | 240 cfm |
| Measured noise range | — | 19–50 decibels |
| Recommended room size (4.8–5 ACH / AHAM) | 674 sq ft | 390 sq ft |
| AHAM-certified smoke CADR | — | 240 CFM |
| Max power draw | 46 W | 56 W |
| Ionization/electronic stage present | — | No |
| Sleep / night mode | Yes | Yes |
| App control | Yes | No |
| Model-specific ozone/technology disclosure | — | CARB classification: Mechanical (G-26-044) |
| Ionizer / electrostatic stage | HEPASilent (electrostatic charging + mechanical filtration) | None (removed vs original Mighty, per HouseFresh) |
| Particle-filter construction/certification | — | Washable pre-filter plus Max2 activated-carbon and IEST-certified HEPA filtration |
| Filter type | HEPASilent particle + carbon filter, washable fabric pre-filter | Washable pre-filter + Max2 combined activated carbon/HEPA |
| Carbon-media format | — | Activated-carbon pellets |
| Main filter life | 9 months | 12 months |
| OEM replacement-filter price | — | 69.99 USD |
| Quiet Mark certified | Yes | — |
| Stated filter interval | — | 12 months |
| Manufacturer direct/list price | — | 269.99 USD |
| Dated US street price | — | 269.99 USD |
| Washable / removable pet pre-filter | — | Yes |
| Activated carbon amount (where disclosed) | — | Not disclosed |
Blueair Blue Pure 211i Max
Pros
- Large CADR headroom
- Night mode with dimmed lights
- Zero Ozone Verified per retailers
- Cheaper than the SP4i
- App control
Cons
- Limited independent noise testing
- Oversized for small rooms
- Loud at max, about 58.7 dBA
- Premium price
A sensible big-room alternative to the SP4i if you want to skip the unswitchable ionizer and save some money.
Full Blueair Blue Pure 211i Max review →Coway Airmega Mighty2 AP-1512N
Pros
- Standard-room workflow
- Mechanical-filtration path
- Distinct exact-model corroborating sources
Cons
- Current ownership conditions require publication-time confirmation
- No cross-publisher quietness ranking is made
Recommended for standard-room use based on firsthand HouseFresh evidence and a distinct exact-model WIRED review.
Full Coway Airmega Mighty2 AP-1512N review →Both products are part of our guide The Best Quiet Air Purifiers for Bedrooms of 2026, where you can see every pick, how we score and current prices from each retailer.