Winix 5520
#5 in Large roomsFull review
A living-room purifier with strong airflow and low filter costs at Amazon’s price. Turn PlasmaWave off if you’re sensitive to ozone.
Amazon $179.99$179.99
The Winix 5520 rates 3.7 among large rooms air purifiers; the Medify MA-40 rates 2.9 among medium rooms ones. The Winix 5520 costs $70 less ($179.99 vs $249.99).
Medify MA-40
#7 in Medium roomsFull review
A mid-to-large-room HEPA purifier with cheap filters, for living rooms where noise isn’t a concern.
Amazon $249.99$249.99
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.
Scores side by side
These two sit in different room size classes (large rooms and medium rooms), and each is scored against the reference points for its own class, so a rating says how well each does among its own room size peers. How we rank explains each factor.
| Factor weight | Winix 5520 | Medify MA-40 |
|---|---|---|
| Overall rating | 3.7/5 | 2.9/5 |
| Value 25% | 77 $0.71 per cfm of smoke CADR | 58 $1.05 per cfm of smoke CADR |
| Filter cost 20% | 87 $47.49 a year in filters | 66 $80.34 a year in filters |
| Quiet 20% | 50 noise at top speed not published (neutral score used) | 0 66 dB at top speed (maker rating) |
| Efficiency 15% | 32 4.6 cfm per watt | 50 efficiency not certified (neutral score used) |
| Auto mode 10% | 100 particle (dual sensors) sensor and Wi-Fi app | 0 no air-quality sensor or app |
| Warranty 10% | 25 2-year warranty | 50 warranty not published (neutral score used) |
Specifications
| Winix 5520 | Medify MA-40 | |
|---|---|---|
| Performance | ||
| Smoke CADR | 253 cfm | 239 cfm |
| Dust CADR | 252 cfm | 231 cfm |
| Pollen CADR | 247 cfm | 240 cfm |
| PM2.5 CADR | 252 cfm | 235 cfm |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 392 sq ft | 370 sq ft |
| Coverage (maker) | 1,882 sq ft | 1,793 sq ft |
| Noise | 23.5 dB | 46 to 66 dB |
| Efficiency | ||
| Efficiency (IEF) | 4.6 cfm/W | - |
| ENERGY STAR | No | No |
| Energy use | 323 kWh/year | - |
| Power at top speed | 65 W | - |
| Filters | ||
| Filter | HEPA | H13 HEPA 3-in-1 (pre-filter, carbon, HEPA) |
| Activated carbon | Yes | Yes |
| Replacement | Filter Q (1712-0123-00) | MA-40 replacement filter |
| Replacement cost | $47.49 every 12 months | $40.17 every 6 months |
| Yearly filter cost | $47.49/year | $80.34/year |
| Ionizer | Yes, can be switched off | - |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | particle (dual sensors) | None |
| Auto mode | Yes | No |
| Wi-Fi app | Yes | No |
| Fan speeds | 5 | 3 |
| Dimensions | 22.17 x 13.59 x 8.27 in | 22 x 10.9 x 9.9 in |
| Weight | 13.3 lb | 15 lb |
| Warranty | 2 years | - |