https://www.thequint.com/tech-and-auto/gadgets/what-are-ionisers-can-they-fight-covid-19
What Are Ionisers and How Effective Are They in Fighting COVID-19?
Mar 31, 2020 - An ion-generator or an ioniser releases negative ions into the air. These negative ions latch on to positive ions in the room such as dust particles, pollen,...
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https://www.puraire.sg/
PurAire Singapore: Bipolar Ionisers for Odour Removal, Mould Elimination & Indoor Air Purification...
odour removal