Levoit Core 400S
#2 in Medium roomsFull review
A strong all-round pick for a living room or large bedroom, with a real particle sensor and app control at a mid-range price.
Amazon $189.97$189.97
The Levoit Core 400S is the better air purifier overall, rated 3.8 to 3.6. The Levoit Core 400S leads on auto mode and warranty. The Coway Airmega Mighty AP-1512HH wins on value. The Coway Airmega Mighty AP-1512HH costs $34.99 less ($154.98 vs $189.97).
Coway Airmega Mighty AP-1512HH
#3 in Medium roomsFull review
A long-running favourite for a bedroom or living room that’s still cheap on Amazon. It has an air quality sensor but no app.
Amazon $154.98$154.98
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Levoit Core 400S for auto mode (PM2.5 laser sensor and Wi-Fi app vs particle sensor, auto mode) and warranty (2-year warranty vs 1-year warranty).
- Choose the Coway Airmega Mighty AP-1512HH for value ($0.67 per cfm of smoke CADR vs $0.82 per cfm of smoke CADR).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every medium rooms air purifier; a clear win is highlighted. How we rank explains each one.
| Factor weight | Levoit Core 400S | Coway Airmega Mighty AP-1512HH |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Value 25% | 75 $0.82 per cfm of smoke CADR | 87 $0.67 per cfm of smoke CADR |
| Filter cost 20% | 83 $49.99 a year in filters | 78 $59.79 a year in filters |
| Quiet 20% | 53 52 dB at top speed (maker rating) | 47 53 dB at top speed (maker rating) |
| Efficiency 15% | 48 5.8 cfm per watt | 50 efficiency not certified (neutral score used) |
| Auto mode 10% | 100 PM2.5 laser sensor and Wi-Fi app | 70 particle sensor, auto mode |
| Warranty 10% | 25 2-year warranty | 0 1-year warranty |
Specifications
| Levoit Core 400S | Coway Airmega Mighty AP-1512HH | |
|---|---|---|
| Performance | ||
| Smoke CADR | 231 cfm | 233 cfm |
| Dust CADR | 240 cfm | 246 cfm |
| Pollen CADR | 259 cfm | 240 cfm |
| PM2.5 CADR | 236 cfm | - |
| CADR certified by | AHAM Verifide | Maker (AHAM AC-1 test) |
| Room size (AHAM) | 358 sq ft | - |
| Coverage (maker) | 1,718 sq ft | 361 sq ft |
| Noise | 24 to 52 dB | 24 to 53 dB |
| Efficiency | ||
| Efficiency (IEF) | 5.8 cfm/W | - |
| ENERGY STAR | Yes | No |
| Energy use | 237 kWh/year | - |
| Power at top speed | 38 W | 77 W |
| Filters | ||
| Filter | HEPA | HEPA |
| Activated carbon | Yes | Yes |
| Replacement | Core 400S-P 3-stage replacement filter | AP-1512HH-FP filter set |
| Replacement cost | $49.99 every 12 months | $59.79 every 12 months |
| Yearly filter cost | $49.99/year | $59.79/year |
| Ionizer | No | Yes, can be switched off |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | PM2.5 laser | particle |
| Auto mode | Yes | Yes |
| Wi-Fi app | Yes | No |
| Fan speeds | 4 | 3 |
| Dimensions | 20.5 x 10.8 x 10.8 in | 18.3 x 16.8 x 9.6 in |
| Weight | 11 lb | 12.3 lb |
| Warranty | 2 years | 1 years |