In 1907 Frederick Gardner Cottrell, a professor of chemistry in the College of California, Berkeley, applied to get a patent on a tool for charging particles and then gathering them by means of electrostatic attraction—the primary electrostatic precipitator. Once a big quantity of particulates have accumulated on the plates, a mechanical system

equivalent in performance to other purifiers its dimensions, the Levoit impressed in initial and lengthy-phrase screening. The Coway Airmega 200M is virtually just like our prime choose, the Coway Airmega AP-1512HH Mighty. The units are created by a similar enterprise, and they're physically so identical that their faceplates and filters are inter