Air Purifiers: These Happen When You Don't Choose It Carefully

An air purifier is a device which removes contaminants from air. Whilst marketed as being of particularly beneficit to allergy sufferers and asthmatics and to reduce second-hand tobacco smoke, unfortunately several models consistently fail to make any difference in clinical testing.

When selecting air purifiers, consumers are influenced by several factors beside the cleaning ability. These include possible hazardous gaseous by-products, noise level, frequency of filter replacement, electrical consumption, and visual appeal. Ozone production is typical for ionizing purifiers and has received much attention recently. Although high concentration of ozone is dangerous, most ionizers produces low amounts of ozone (<0.05 ppm). Some purifiers also produce hydroxyl radicals and nitrogen oxides, and they can be dangerous to health. The noise level of a purifier can be obtained easily through consumer service department and is usually reported in decibel (dB). The noise levels for most purifiers are low compared to many other home appliances and are not expected to cause hearing loss. However, purifiers are expected to operate long period of time. Therefore, even a moderate level of noise can be disturbing to some people. Frequency of filter replacement and electrical consumption are the major operation costs for any purifier. There are many different types of filters; some can be cleaned by water, by hand or by vacuum-cleaning, while others need to be replaced every few months or years. Some purifiers are certified as energy star and are energy efficient.

Reference: Wikipedia

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