Short answer: The Coway Airmega AP-1512HH ($190) wins on value - $300 cheaper over 3 years, with built-in eco mode and a 12-month HEPA filter. The Blueair Blue Pure 211+ ($220) wins on raw power - 350 CFM CADR covers 540 sq ft vs Coway's 361 sq ft. Get the Coway for most rooms. Get the Blueair only if you need 400+ sq ft coverage.
The Coway Airmega AP-1512HH and the Blueair Blue Pure 211+ are both premium air purifiers in the $190-220 range. They're frequently compared because they're priced similarly and both target mid-to-large rooms. But their approaches are quite different.
The Coway is the efficiency pick - Wirecutter's longtime favorite with smart eco mode and low running costs. The Blueair is the power pick - maximum CADR for the largest rooms. Here's how to choose between them.
The 3-Year Cost Difference
This is the number that jumps out. Over 3 years of ownership:
Coway: $190 unit + ($55/year in filters x 3) = ~$355 total
Blueair: $220 unit + ($140/year in filters x 3) = ~$640 total
That's a $285 difference in total cost of ownership. The Coway's HEPA filter lasts 12 months vs the Blueair's 6 months, and each Coway replacement costs $40-57 vs $70 for Blueair. The Coway also has an eco mode that turns the fan off when air quality is good, further reducing electricity costs.
If budget matters at all, the Coway wins decisively on long-term value.
Room Size and Raw Power
The Blueair's advantage is straightforward: it moves more air. At 350 CFM CADR, it covers 540 sq ft compared to the Coway's 233-246 CFM and 361 sq ft coverage.
For an open-concept living/kitchen area, a large basement, or any room over 400 sq ft, the Blueair is the only one of these two that can handle it. The Coway will work harder and still not cycle enough air in a space that large.
For rooms 200-361 sq ft - which includes most bedrooms, offices, and standard living rooms - the Coway is perfectly adequate and saves you significant money.
Smart Features Comparison
The Coway has a built-in air quality indicator (color-changing LED ring), auto mode that adjusts fan speed to air quality, and eco mode that shuts off the fan when the air is clean. It also has a filter replacement indicator so you know exactly when to change filters.
The base Blueair 211+ has none of these features - just three fan speeds and a power button. The Blueair 211+ Auto version adds an air quality sensor and auto mode, but it costs more and still lacks eco mode or a filter replacement indicator.
Neither has Wi-Fi or app control in their base models. If you want those features, look at the Levoit Core 300S instead.
Head-to-Head Comparison
Coway Airmega Advantages
- $285 cheaper over 3 years
- HEPA filter lasts 12 months (vs 6)
- Eco mode saves energy
- Built-in air quality LED indicator
- Filter change reminder
- Wirecutter top pick for years
Blueair Blue Pure 211+ Advantages
- 350 CFM CADR (42% more cleaning power)
- 540 sq ft coverage for large rooms
- Beautiful fabric-wrapped design
- Excellent for open floor plans
- Strong across dust, smoke, and pollen
The Bottom Line
For most families, the Coway Airmega AP-1512HH is the smarter buy. It costs $285 less over 3 years, has better smart features (eco mode, air quality indicator, filter alerts), and handles rooms up to 361 sq ft. There's a reason Wirecutter keeps picking it year after year.
Get the Blueair Blue Pure 211+ only if you have a room larger than 360 sq ft that needs cleaning. Its 350 CFM CADR and 540 sq ft coverage genuinely can't be matched by the Coway. But if your room fits within 361 sq ft, the Coway does the job for hundreds less.