Coway Airmega 400S
Score: 92/100
Dyson Purifier Cool TP4B
Score: 75/100Rankings
The Coway Airmega 400S is a powerful, Wi-Fi-enabled smart air purifier for large spaces up to 3,120 square feet, featuring True HEPA filtration and app control. Its main trade-off is the high cost of annual filter replacements and its bulky size. It is ideal for users managing large open spaces who require powerful purification and remote monitoring capabilities.
The Dyson Purifier Cool TP4B is a 2-in-1 appliance that combines air purification with cooling fan functionality. It utilizes a fully-sealed HEPA H13 filter and activated carbon layer to capture 99.97% of particles as small as 0.3 microns while removing gases, odors, and harmful toxins like formaldehyde. The device automatically senses air quality changes, displays real-time pollution data on an LCD screen, and offers up to 350° oscillation with a backwards airflow mode for purification without cooling.
| Attribute | | |
|---|---|---|
1,560 sq_ftbest | — | |
400 cfmbest | — | |
| ↓ lower better | 22 dBbest | — |
12 monthsbest | 12 monthsbest | |
| ↓ lower better | 66 wattsbest | — |
5best | — | |
| ↓ lower better | 24.7 lbs | 10.98 lbsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(3) | ||
Coverage Area (sq_ft) | 1560 sq_ft | null sq_ft |
Clean Air Delivery Rate (CADR) (cfm) | 400 cfm | null cfm |
Noise Level (dB) | 22 dB | null dB |
Filtration(1) | ||
Filtration Type | True HEPA | HEPA H13 + Activated Carbon |
Smart Features(1) | ||
Smart Connectivity / App Control | true | false |
General(1) | ||
Warranty | 5 years | null |
Power & Energy(2) | ||
Power Consumption (watts) | 66 watts | null watts |
Energy Efficiency Rating | Energy Star | Not Specified |
Design(1) | ||
Weight (lbs) | 24.7 lbs | 10.98 lbs |
Controls(3) | ||
Fan Speeds | 5 | null |
Control Interface | Touch/App | LCD Display |
Timer Settings | true | null |
Professional reviewers consistently rank it as a class leader in air cleaning performance, awarding it top marks for CADR ratings and large-space coverage up to 3,120 square feet.
Consumers express strong satisfaction with rapid dust removal and smart integration, but complain about the financial impact of yearly filter replacements and occasional wireless pairing difficulties.
Professional reviewers and editors highlight that the TP4B delivers premium air purification performance comparable to Dyson's higher-end models, thanks to its fully-sealed HEPA H13 filtration system which captured over 95% of monitored particles in testing. Experts agree that the device offers excellent value for money, as it maintains identical core cooling and purification capabilities while costing approximately $100 less than the TP07 sister model. The consensus is that sacrificing smart home integration is an acceptable trade-off for most buyers seeking reliable air quality management without unnecessary connectivity features.
