Blueair Blue Pure 311i Max vs Coway AP-1512HH Mighty
Quick take: The Coway AP-1512HH Mighty costs $60 less; the Blueair Blue Pure 311i Max moves more air (250 CADR); the Coway AP-1512HH Mighty includes an ionizer — some buyers avoid these (see its cons for the ozone note).
| Spec | Blueair Blue Pure 311i Max | Coway AP-1512HH Mighty |
|---|---|---|
| Price | ~$230 | ~$170 |
| Rating | 4.8★ (236) | — |
| Type | Large Room | Large Room |
| CADR (smoke) | 250 CFM | 233 CFM |
| Honest Coverage (AHAM) | ~387 sq ft | ~361 sq ft |
| Claimed Coverage | 2,107 sq ft | 874 sq ft |
| Noise (sleep) | 23 dB | 24 dB |
| Noise (max) | 50 dB | 54 dB |
| Filter Cost / Year | $60 | $50 |
| Filter | HEPASilent particle + carbon combo (F3Max) | True HEPA + activated carbon |
| Filter Life | 9 mo | 12 mo |
| Max Power | 29W · Energy Star | 77W · Energy Star |
| Auto Mode | Sensor + auto | Sensor + auto |
| Ionizer | None | Yes |
| WiFi Control | Built-in | None |
| Weight | 8 lbs | 12.3 lbs |
| Maintenance | The washable fabric pre-filter sleeve is the outer shell itself — pull it off and throw it in the laundry every month or two (spare colors sold separately). The F3Max combo filter drops in from the top and is rated about 9 months at ~$44, so a real year runs near $60; the app tracks remaining life. No sensor cleaning ritual like Coway/Winix — the particle sensor is behind a small vent, wipe occasionally. Register within 60 days of purchase or the warranty stays at 1 year instead of 3. | The front panel pops off without tools; vacuum the washable pre-filter every 2-4 weeks. The carbon filter is replaced every 6 months and the True HEPA annually, and OEM filters are cheap and everywhere — a full year of genuine filters runs about $50, with quality third-party options under $35. Wipe the particle sensor lens (right side, behind a small door) every couple of months or auto mode gets lazy. No app, no subscription, no DRM chips on filters. |
| Warranty | 1 year (3 with registration within 60 days) | 3 years |
Pros & cons
Blueair Blue Pure 311i Max
- ✓Class-leading noise-to-CADR ratio: 250 CFM topping out at ~50 dB
- ✓387 sq ft honest AHAM rating — higher than Coway/Winix rivals
- ✓29-watt max draw, 2.8 watts in sleep mode
- ✓Washable fabric pre-filter shell doubles as the design
- ✓Featherweight 8 lbs — trivial to move room to room
- ✓Solid app with auto mode, scheduling, and filter tracking
- ✓No room ionizer at all — internal charging with near-zero published ozone
- ✗2,107 sq ft claim is the most inflated marketing number in the class
- ✗~$60/yr filter cost with no established third-party alternative
- ✗Warranty is only 1 year unless you register within 60 days (then 3)
- ✗LED shows color codes, not a PM2.5 number — details require the app
- ✗$230 list is steep; only buy on the frequent sub-$200 sales
Coway AP-1512HH Mighty
- ✓AHAM-verified performance that matches purifiers costing twice as much
- ✓Very quiet 24 dB lowest speed — fine for light sleepers
- ✓Cheap filters (~$50/yr OEM, less third-party) available everywhere
- ✓Eco mode stops the fan when air is clean, cutting power use to near zero
- ✓3-year warranty beats Winix and Levoit
- ✓Ionizer is fully switchable and off by default
- ✓Light (12.3 lbs) with a simple pop-off front panel
- ✓Constant sale pricing — routinely dips to $140-150
- ✗Dust sensor is dated and reacts slower than newer rivals
- ✗No Wi-Fi or app on this model
- ✗Air-quality ring is bright at night and lamp-off is manual
- ✗54 dB on high is noticeable in a bedroom
- ✗874 sq ft marketing claim is a 1-ACH number — real coverage is 361 sq ft
- ✗Design is functional but plasticky next to a Blueair