There is no doubt that the VEVA ProHEPA 9000 Air Purifier stands out from the rest due to its ease of use. This device has a digital display and three buttons: Power, Mode, and Timer. Pressing the Power button turns on the purifier, and pressing it again cycles through three modes. In “Auto,” the purifier is set to medium air exchange and is so quiet that you won’t hear it. Max mode sounds like a hair dryer and exchanges the most air, making it useful for odors that need to be neutralized as soon as possible. A third mode is Timer, which lets you set an interval of two hours for the purifier to turn on and off.
During our tests, we found that this purifier reduced airborne particles by 99.9%. As far as odor reduction was concerned, it ranked among the best. As we didn’t test particle reduction while running on low power, we did test it while running on medium power, so we can assume that it will last as long as its competition.