ConsFirst / Air purifiers / Compare
Coway Airmega Mighty vs Levoit Core 600S Smart Air Purifier
Which one has the downsides you can live with?
We may earn a commission when you buy through our links. It never changes what we report. Learn more
The short answer
Coway Airmega Mighty ranks higher (#2 vs #4 of 8) and scores better on quietness, filter cost, durability. Levoit Core 600S Smart Air Purifier wins on controls & app.
The biggest complaint about the Coway Airmega Mighty is loud on high; for the Levoit Core 600S Smart Air Purifier it's loud or rattling at high speeds. Pick the one whose catch bothers you less.
Side by side
| Coway Airmega Mighty | Levoit Core 600S Smart Air Purifier | |
|---|---|---|
| Rank in air purifiers | #2 | #4 |
| Price tier | $$ | $$ |
| Type | HEPA + carbon | HEPA + carbon |
| Amazon 1–2★ share | 4% | 4% |
| Overall score | 4.0 | 3.7 |
| Cleaning performance | 4.5 | 4.5 |
| Quietness | 3.0 | 2.5 |
| Filter cost | 4.5 | 3.0 |
| Controls & app | 3.0 | 5.0 |
| Durability | 5.0 | 3.5 |
Price tiers: $ under $150 · $$ $150–350 · $$$ over $350. Highlighted = clearly better (a score gap of 0.3 or more, or a 1–2★ share at least 3 points lower). Scores are explained, with sources, on each product's page.
Top complaints
Coway Airmega Mighty
- Loud on high
HouseFresh measured 60.1 dB at top speed and says it is louder than many tested models. TechGearLab scored noise 5.6/10, citing about 55 dB and vibration on high.
Source: HouseFresh review, TechGearLab - Weak odor filter
HouseFresh and TechGearLab both say its carbon is impregnated fabric, which is less effective than pelleted carbon. Amazon's review summary calls odor removal mixed, with some owners complaining of a bad smell.
- Power-hungry, bright light, frequent filter swaps
Wirecutter measured 68.7 W on high and HouseFresh 75.3 W. Some Amazon owners find the blue air-quality light too bright for sleep. TechGearLab notes carbon changes every 6 months and HEPA every 12.
Levoit Core 600S Smart Air Purifier
- Loud or rattling at high speeds
Wirecutter heard a persistent rattle on medium-high and high that repositioning didn't fix. HouseFresh measured 62.3 dBA at top speed and an annoying whir on speed 1.
Source: Wirecutter, HouseFresh review - Filter not HEPA as first advertised
HouseFresh says the filter is HEPA-grade only in sleep mode and that Levoit dropped its HEPA claims in 2023 after a BBB challenge brought by Dyson. Particle filtration is still excellent.
Source: HouseFresh review - Bonded filter and running cost
HouseFresh notes the bonded filter must be replaced whole when the carbon is spent ($59.99, 6-12 months; about $173/year to run). Amazon shoppers are split on whether it's worth the price.
Who should pick which
Pick the Coway Airmega Mighty if
Bedrooms and living rooms up to about 360 sq ft
Proven long-term reliability
Low filter costs
Skip it if: You need strong odor removal; You want an app; You'll run it on high a lot
Pick the Levoit Core 600S Smart Air Purifier if
Large rooms on a mid budget
App automations and smart-home setups
Fast cleanup on high
Skip it if: You want quiet high-speed running; You want a true-HEPA-rated filter; You're short on floor space
We don't list prices — they change daily. Paid links.