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2. Air ioniser - Wikipedia

   en.wikipedia.org/wiki/Air_ioniser

   An air ioniser (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to ionise (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in ...

3. Air purifier - Wikipedia

   en.wikipedia.org/wiki/Air_purifier

   Air purifier. An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke .

4. 9 Best Air Purifiers of 2023, According to Testing - AOL

   www.aol.com/lifestyle/9-best-air-purifiers-2023...

   The triple-duty machine is a heater, fan and air purifier all in one. Using a True HEPA filter, this Dyson air purifier claims to clear up to 99.97% of airborne pollutants, including smoke from ...

5. Do Air Purifiers Actually Work? Here's What Experts Say - AOL

   www.aol.com/air-purifiers-actually-heres-experts...

   Every model included in the Good Housekeeping Institute's rigorously tested guide to the best air purifiers you can buy has a true HEPA filter. The air purifier's fan draws air into the filter and ...

6. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   Portable water purification unit used by International Red Cross and Red Crescent. Portable water purification devices are self-contained, easily transported units used to purify water from untreated sources (such as rivers, lakes, and wells) for drinking purposes. Their main function is to eliminate pathogens, and often also of suspended ...

7. 5 best lab-tested air purifiers - AOL

   www.aol.com/news/5-best-lab-tested-air-144708356...

   Honeywell HPA304 $ at Amazon. Honeywell HPA304 $ at Walmart. This air purifier is a good fit if you need strong filtration for a large space. According to AHAM lab results, it has a very high CADR ...