Bombarded by pollen, pet dander, dust, mold, and\u2014worst of all\u2014smoke? Air purifiers are excellent for improving air quality, but to tackle particles as small as 0.3 microns, like the ones listed, you need a true HEPA filter. In that case, the best air purifier under 100 has to be the Levoit LV-H132.\r\n\r\nWhy We Like It - Levoit LV-H132\r\nIf smoke, pollen, and pet dander are constant threats to your internal systems, this air purifier has a 3-stage filtration system with activated carbon filter to combat particles as small as 0.3 microns.\r\n\r\nPerformance\r\nHow does the Levoit Air Purifier LV-H132 do it? By using a 3-stage filtration system, the air purifier is able to capture particles as small as 0.3 microns. Its pre filter system starts attacking dust, pet dander, mold and fungi, then moves on to the HEPA filter and activated carbon filter to further purify the air and leave it pollutant-ozone free up to an 87-square foot area. It\u2019s a bit on the smaller size; the GermGuardian AC4825 doubles the area of the effect.\r\nDesign\r\nThe Levoit LV-H132 isn\u2019t the smallest air filter on our list and is comparable to the KOIOS Upgraded Purifier. Using the air purifier is straightforward with all the buttons you need located along the time, like speed settings\u2014which there are three and all have low white noise. One feature to consider is the night light. It\u2019s a nice little bonus that adds a small amount of comfort to your child if this filter is housed in their room.\r\n\r\nThe biggest gripe we had was with air filter replacements. It comes with a pre-installed filter, but after about 3 months, you\u2019ll replace it. That\u2019s far too often, in our opinion.\r\nValue\r\nFor the price you\u2019re paying, the Compact Air Purifier Levoit LV H132 really kicks butt. Levoit did exactly what they wanted: a budget air cleaner that performs well. It isn\u2019t the most powerful, but it\u2019s so easy on your wallet to experience what true HEPA filtration is like, albeit in a smaller area of effect. If you still want that true HEPA filtration, but in a much smaller capsule, then the Pluggable Air Purifier and Sanitizer could be a better option, at the cost of performance; otherwise the Levoit LV H132 Air Purifier is the way to go.\r\nLevoit LV-H132 Wrap Up\r\nTo conclude our Levoit LV H132 review, the Levoit LV-H132 best serves smaller rooms where its smaller area of effect isn\u2019t a problem. Even with such a focused area of effect, it\u2019s still one of the few budget air purifiers with a true HEPA filter that tackles particles as small as 0.3 microns\u2014but only if you can deal with changing filters every few months.