Coway Airmega 400S Air Purifier Review: Less smoke, more smart

You end up thinking a lot about air quality when a thick pall of smoke has been hanging outside your windows for two weeks solid – enough to make you think that a high-tech air purifier is probably a very good addition to most homes. Coway’s Airmega 400S is one such example, combining a voracious appetite for air impurities with …