Levoit Core 400S Air Purifier vs Coway Airmega 400(G) Air Purifier

The Coway Airmega 400(G) is the stronger pick for large, open rooms: dual-sided filtration and roughly 410 CFM of airflow clean far more space per hour, and its 22 dB floor is quieter than the Levoit's 28 dB. The Levoit Core 400S is the better fit for a bedroom or single room, where its smaller footprint, app control, PM2.5 readout and display lock matter more than raw coverage. Owners of both praise build quality; Coway backs its unit with a 5-year limited warranty, while Levoit's filter is rated for about 12 months.

• Choose the Levoit Core 400S if you are purifying one bedroom or office and want app control, a live PM2.5 reading and a child lock in a compact tower.
• Choose the Coway Airmega 400(G) if you need to clean a large open living area fast and want the quietest operation and the longest warranty.