Head to head
Coway Airmega 400 vs Winix 5500-2 Air Purifier
Coway Airmega 400 leads 4 to 1 on the 5 rankable specs, but Winix 5500-2 Air Purifier costs $390 less.
Catalog as of September 1, 2026
Why, in numbers
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Levoit Core 300S Smart True HEPA Air Purifier$149Levoit Core 400S$219Coway Airmega AP-1512HH Mighty$229Blueair Blue Pure 311i Max$229Honeywell HPA300 HEPA Air Purifier$249Levoit Core 600S Smart True HEPA$299Blueair Blue Pure 211+ Auto$339Coway Airmega 250$399Blueair Protect 7470i$649Alen BreatheSmart 75i Large Room Air Purifier$749Dyson Purifier Hot+Cool Formaldehyde HP09$799Buying for
Straight answer
Overall: 4 to 1
Buy the Coway Airmega 400.
- Leads 4 of 5 rankable overall specs; Winix 5500-2 Air Purifier takes 1.
- CADR: 350 CFM vs 232 CFM
- Coverage area: 1,560 sq ft vs 360 sq ft
- Winix 5500-2 Air Purifier is $390 cheaper. Pay the difference only if cadr matters to you.
At a glance
The handful of numbers that decide most purchases in this category.
CADR
Coway
350 CFM (Smoke), 328 CFM (Dust), 400 CFM (Pollen)
Winix
232 CFM (Smoke), 243 CFM (Dust), 246 CFM (Pollen)
Coverage area
Coway
1,560 sq ft (2 air changes/hr) / 780 sq ft (4 air changes/hr)
Winix
360 sq ft (5 air changes/hr) / 880 sq ft (2 air changes/hr)
True 3-Year Cost of Ownership (TCO)
Coway Airmega 400
Winix 5500-2 Air Purifier
The 90-Day Owner Regret Check
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Coway: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Winix: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Performance
leads 2-0| CADR | 350 CFM (Smoke), 328 CFM (Dust), 400 CFM (Pollen) (wins this row: higher) | 232 CFM (Smoke), 243 CFM (Dust), 246 CFM (Pollen) |
|---|---|---|
| Room size | Large living rooms, open floor plans, offices | Bedrooms, nurseries, home offices up to 360 sq ft |
| Coverage area | 1,560 sq ft (2 air changes/hr) / 780 sq ft (4 air changes/hr) (wins this row: higher) | 360 sq ft (5 air changes/hr) / 880 sq ft (2 air changes/hr) |
Filters
2 differences| Filter types | Washable Pre-filter + Max2 Filter (True HEPA + Activated Carbon) | Fine Mesh Pre-Filter + Washable AOC Carbon + True HEPA (99.97%) |
|---|---|---|
| Filter life | 12 months (Max2 filter) / Washable pre-filters | 12 months (HEPA) / Washable carbon filter |
Usability & Smart
leads 1-0| Noise levels | 22 dB (Sleep mode) – 52 dB (Max speed) (wins this row: lower) | 27.8 dB (Silent) – 54.8 dB (Turbo) |
|---|---|---|
| Energy consumption | 66 W max power consumption (Energy Star Certified) | 70 W max (Energy Star) |
| Smart features | Smart Auto Mode + Eco Mode (no Wi-Fi app) | Auto Mode + Sleep Mode with Smart Light Sensor (No Wi-Fi) |
| Air quality sensors | Real-time particle sensor with colorful LED ring indicator | Smart Optical Air Quality Sensor (3-color LED indicator) |
Design & Ownership
2 differences| Weight | 24.7 lb (11.2 kg) | 14.7 lb (6.7 kg) (wins this row: lower) |
|---|---|---|
| Warranty | 5 years limited motor / 1 year electronic parts (wins this row: higher) | 2 years |
Which one should you buy
Pick this one if
Coway Airmega 400
Dual-suction large room air purifier with Max2 HEPA and activated carbon filtration covering 1,560 sq ft.
- Massive CADR cleans up to 1,560 sq ft twice per hour
- Dual-sided air intake with combined True HEPA and carbon filters
- Smart Eco mode turns off fan when air remains clean for 30 minutes
What you give up
- Cube design has a large floor footprint
- No mobile app connectivity on the non-S model
Pick this one if
Winix 5500-2 Air Purifier
Budget favorite with PlasmaWave technology, Washable AOC Carbon Filter, and True HEPA filtration.
- Washable Advanced Odor Control (AOC) carbon filter with real carbon pellets
- PlasmaWave technology breaks down pollutants at molecular level
- Unbeatable performance per dollar in medium rooms
What you give up
- No mobile app connectivity or smart home controls
- Aesthetics and plastic chassis are dated
Best for each use
Bedrooms
Tied on bedrooms. Winix 5500-2 Air Purifier is cheaper.
Big rooms & allergies
For big rooms & allergies, buy the Coway Airmega 400.
Low running cost
Too close to call on low running cost from the spec sheets. Only warranty is rankable here.
Done deciding?
Open the full standalone spec sheet for either device.
Manufacturer pages: Coway Airmega 400 ↗ · Winix 5500-2 Air Purifier ↗
Common questions
Which is cheaper, the Coway Airmega 400 or the Winix 5500-2 Air Purifier?
Winix 5500-2 Air Purifier costs $390 less at list price.
What is the biggest catch with the Coway Airmega 400 or Winix 5500-2 Air Purifier?
Both has this deal-breaker: no Wi-Fi app. No schedules or remote control from your phone.
Which is better for bedrooms, the Coway Airmega 400 or the Winix 5500-2 Air Purifier?
Tied on bedrooms. Winix 5500-2 Air Purifier is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $390 at list price.
What cannot be compared from spec sheets?
Of the 11 specs tracked here, 6 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.