Head to head
Coway Airmega 400 vs Coway Airmega AP-1512HH Mighty
Coway Airmega 400 leads 4 to 1 on the 5 rankable specs, but Coway Airmega AP-1512HH Mighty costs $320 less.
Catalog as of September 1, 2026
Why, in numbers
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Coway sibling models compared across generations.
Our recommendation: Compare the spec differences below to see if the price premium justifies the newer model's additions.
Buying for
Straight answer
Overall: 4 to 1
Buy the Coway Airmega 400.
- Leads 4 of 5 rankable overall specs; Coway Airmega AP-1512HH Mighty takes 1.
- CADR: 350 CFM vs 233 CFM
- Coverage area: 1,560 sq ft vs 361 sq ft
- Coway Airmega AP-1512HH Mighty is $320 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
Airmega 400
350 CFM (Smoke), 328 CFM (Dust), 400 CFM (Pollen)
Airmega AP-1512HH Mighty
233 CFM (Smoke), 246 CFM (Dust), 240 CFM (Pollen)
Coverage area
Airmega 400
1,560 sq ft (2 air changes/hr) / 780 sq ft (4 air changes/hr)
Airmega AP-1512HH Mighty
361 sq ft (4.8 air changes/hr) / 874 sq ft (2 air changes/hr)
True 3-Year Cost of Ownership (TCO)
Coway Airmega 400
Coway Airmega AP-1512HH Mighty
Room Placement & Bedroom Noise Check
Physical clearance required for airflow, wall placement, and bedroom noise levels.
Wall Clearance Required
Requires 12 in perimeter airflow space
Front-intake design: can sit almost flush against walls (leaves floor space open)
Nighttime Sleep Mode Noise
Standard sleep speed
24.4 dB lowest speed (vital ionizer can be toggled off)
Unit Footprint & Dimensions
Standard room purifier footprint
Boxy square unit (16.8 × 18.3 × 9.6 in; 12.3 lb)
The 90-Day Owner Regret Check
Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.
Airmega 400: What to watch for
- Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Airmega AP-1512HH Mighty: What to watch for
- Hardware Quirk
Ionizer ("Vital Ion") produces negligible ozone and should be disabled.
Performance
leads 2-0| CADR | 350 CFM (Smoke), 328 CFM (Dust), 400 CFM (Pollen) (wins this row: higher) | 233 CFM (Smoke), 246 CFM (Dust), 240 CFM (Pollen) |
|---|---|---|
| Room size | Large living rooms, open floor plans, offices | Bedrooms, home offices, medium living rooms |
| Coverage area | 1,560 sq ft (2 air changes/hr) / 780 sq ft (4 air changes/hr) (wins this row: higher) | 361 sq ft (4.8 air changes/hr) / 874 sq ft (2 air changes/hr) |
Filters
2 differences| Filter types | Washable Pre-filter + Max2 Filter (True HEPA + Activated Carbon) | 4-Stage: Washable Pre-filter + Deodorization Carbon + True HEPA + Vital Ion |
|---|---|---|
| Filter life | 12 months (Max2 filter) / Washable pre-filters | 12 months (True HEPA) / 6 months (Carbon) |
Usability & Smart
leads 1-0| Noise levels | 22 dB (Sleep mode) – 52 dB (Max speed) (wins this row: lower) | 24 dB (Low) – 53 dB (Turbo high) |
|---|---|---|
| Energy consumption | 66 W max power consumption (Energy Star Certified) | 77 W max (Energy Star verified, 4.9W in Eco mode) |
| Smart features | Smart Auto Mode + Eco Mode (no Wi-Fi app) | Smart Auto Mode + Eco Mode (no Wi-Fi app) |
| Air quality sensors | Real-time particle sensor with colorful LED ring indicator | Air quality particle sensor with 3-color real-time LED indicator |
Design & Ownership
2 differences| Weight | 24.7 lb (11.2 kg) | 12.3 lb (5.6 kg) (wins this row: lower) |
|---|---|---|
| Warranty | 5 years limited motor / 1 year electronic parts (wins this row: higher) | 3 years limited manufacturer warranty |
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
Coway Airmega AP-1512HH Mighty
Award-winning compact 4-stage True HEPA air purifier with Vital Ionizer and energy-saving Eco mode.
- High smoke and particulate filtration efficiency in a compact footprint
- Eco Mode powers off fan automatically after 30 minutes of clean air
- Washable pre-filter extends the life of internal carbon and HEPA filters
What you give up
- No Wi-Fi connectivity or mobile smartphone app
- Ionizer feature produces trace ozone if left enabled
Best for each use
Bedrooms
Tied on bedrooms. Coway Airmega AP-1512HH Mighty 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 ↗ · Coway Airmega AP-1512HH Mighty ↗
Common questions
Which is cheaper, the Coway Airmega 400 or the Coway Airmega AP-1512HH Mighty?
Coway Airmega AP-1512HH Mighty costs $320 less at list price.
What is the biggest catch with the Coway Airmega 400 or Coway Airmega AP-1512HH Mighty?
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 Coway Airmega AP-1512HH Mighty?
Tied on bedrooms. Coway Airmega AP-1512HH Mighty is cheaper. The 2 rankable bedrooms specs split 1 to 1. Saves $320 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.