Bests & Worsts Reviews from Amazon

This is still the least-expensive, but most effective, out of now five air purifiers I’ve bought over the years. I like to do the “flashlight test,” with every air purifier I buy, because combating dust in my older Bay Area home is the main reason I bother with these machines. I hold a bright flashlight beam up against the entry points to the filter and see how much dust is being drawn in. If a lot of dust is being drawn in, I know the purifier is a keeper. If not, then either the room I'm in is somehow cleaner than the rest of the house or (more likely) it's just not moving a lot of air. With the Levoit 300s, I can always see a lot of dust being drawn in. Levoit is a brand I've grown to trust. They don’t make ridiculous claims about their filters, square footage or CADR. You can count on the fact that their numbers are legitimate and independently verified. There are a number of features that make this purifier a great value. At $90, the 141 CFM is impressive. You can easily spend twice this and get the same CFM or even lower. It has a simple touchscreen display that can be blacked out with the push of a button (which comes in handy and night and is no small thing as most purifiers don't do this). It has a filter reminder that goes off whenever you need to chance filters. Switching filters is very easy, just turn the machine off, flip it over and unscrew the bottom, take out the old filter and drop in the new one. The size and weight make it perfect for a nightstand, and there's no doubt that it will draw in more air in an elevated position than it will sitting on the ground in a corner. I've only had to change the filter a couple of times in two-and-a-half years. I suspect this because I have clean air owing to the multiple purifiers I have operating.