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As the name suggests, air purifiers are used to remove various kinds of impurities from indoor air. Choosing the right type depends on the type of impurities you want to remove and the size of the room where the device is to be used. The key parameters to keep in mind are the filtration type and the purifier’s performance.
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Filtration type
choose depending on the type of impurities and overall maintenance
almost 100% percent efficient in removing dust particles
cannot absorb odours
quiet operation
washable
Water filter
dust and microbes settle in a water tank
50 - 70% dust collection efficiency
acts as a humidifier
requires regular cleaning and maintenance (anti-scaling)
not suitable for allergy sufferers
Photocatalytic filter
removes toxic substances in addition to viruses and bacteria
removes impurities using UV radiation
may create large amounts of ozone
air purifiers are sometimes equipped with an ioniser, which raises air filtration effectiveness
Purifier output
should be appropriate for the size of the room in which you are planning to use it
the purifier should be able to filter all the air in the room about 2.5 times per hour, or 4 times if you are buying it for an allergy sufferer
the mathematical formula for calculating the airflow output (m3/h) is the following: floor area (m2) × room height (m) × 2.5 (4)
Noise levels
inherently connected to the overall output; the more powerful the machine, the more noise it makes
particularly important if you want to leave it on overnight, max. 30 db
Features
Power control - allows you to reduce its output at night, making it whisper-quiet when you need it
Detection of impurities - sensors monitor the air quality, allowing the purifier to adjust its output depending on the current conditions
Other features: timer, remote control, change filter indicator lights
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