User:Stuart.Batterman/sandbox

Use and benefits of purifiers
Most purifiers use filters to remove particles from air; some with activated carbon or other adsorbents can remove some gases and vapors. Particles such as dust, pollen, pet dander, mold spores, and dust mite feces can act as allergens, triggering allergies in sensitive people. Smoke and other particles from cigarette smoking and outdoor sources such as diesel particulate matter can also be removed. These particles tend to be small and can penetrate deep into the lung, and not all filters are effective for these particles. These particles are sometimes called PM2.5 or particulate matter under 2.5 micrometer diameter. Gases such as sulfur dioxide and vapors such as volatile organic compounds (VOCs) can pose a risk to health. Exposure to various components such as VOCs increases the likelihood of experiencing symptoms of sick building syndrome.