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Air purifiers and air ionisers for viruses and bacteria, 5-10 m2 room, CADR rating 100-199 m3/h, night mode
- To remove viruses and bacteria you should use an air purifier that is powerful enough to drag all of the air in the room through the filters a minimum of 6 times an hour (ACH) for it to be genuinely effective. To get around 6 air changes per hour in your room measuring between 5 and 10 m2 you need an air purifier with a clean air delivery rate (CADR) in the range of 100-199 m3/h.
- For a bedroom or baby room, you may want to use a quieter air purifier that comes with "night" mode. Air purifiers with "night" mode run quietly in the background allowing you to enjoy clean air while you sleep.
- Air ionisers are fanless, use very little electricity, virtually silent, easy to move from room to room, don't create draughts or use filters, except for ones that include a positively charged collector.
- Electrostatic air purifiers use a fan to speed things up and have a positively charged replaceable filter that attracts particles.