NuWave OxyPure vs Coway Airmega 400

The Coway Airmega 400 is a slightly better air purifier overall than the NuWave OxyPure, though the two are closely matched on air-cleaning performance. Both are built for larger spaces and deliver excellent particle filtration, but the Coway edges ahead with stronger overall filtration and quieter operation. The NuWave is a compelling alternative, particularly in terms of cost. Its filtration system is unusual in that it relies largely on washable filters with an advertised lifespan of up to 20 years, which can make it significantly cheaper to run over time compared to the Airmega 400's two replaceable cartridges that Coway recommends swapping out annually. The NuWave also adds smartphone app connectivity and a broader range of operating modes.