As temperatures decrease, many people have been troubled by colds. Today Himfr recommends an air purifier with a germicidal feature; it not only filters out airborne bacteria and dust, but also removes the air s toxic substances, such as formaldehyde.
An air purifier is a device which removes contaminants from the air. Air purifiers for residential use are commonly marketed as being particularly beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second hand tobacco smoke. Commercial grade air purifiers are manufactured as both a small stand alone unit, and as larger units that can be affixed to an air handler unit (AHU) or to an HVAC unit found in the medical, industrial, and commercial industries.
Dust, pollen, pet dander, mold spores, and dust mite feces can act as allergens, triggering allergies in sensitive people. Smoke particles and volatile organic compounds (VOCs) can pose a risk to health. Exposure to various components such as VOCs increases the likelihood of experiencing symptoms of sick building syndrome.Additionally, with the advancement in technology, air purifiers are becoming increasingly capable of capturing a greater number of bacterial, virus, and DNA damaging particulates. Air purifiers are used to reduce the concentration of these airborne contaminants and though very useful for people who suffer from allergies and asthma, technological and scientific studies are finding that poor air quality is more a contributing factor of some forms of cancer, respiratory illnesses, COPD, and other pulmonary infections and illnesses. They also reduce the need for frequent room and area cleaning. Air purifiers use a small amount of electrical energy, causing a small expense and environmental effect, however the net return is considered greater than the cost.
Other aspects of air cleaners are: hazardous gaseous by products, noise level, frequency of filter replacement, electrical consumption, and visual appeal. Ozone production is typical for air ionizing purifiers. Although high concentration of ozone is dangerous, most air ionizers produce low amounts . The noise level of a purifier can be obtained through a customer service department and is usually reported in decibels . The noise levels for most purifiers are low compared to many other home appliances. However, the noise level of some air conditioners or air purifiers with their fans running on high speed for several hours a day may cause hearing loss[citation needed]. Air purifiers are expected to operate over long periods, therefore, even a moderate noise can be disturbing or damaging. Frequency of filter replacement and electrical consumption are the major operation costs for any purifier. There are many types of filters; some can be cleaned by water, by hand or by vacuum cleaner, while others need to be replaced every few months or years. In the United States, some purifiers are certified as ENERGY STAR and are energy efficient.
HEPA technology is used in portable air purifiers as it removes common airborne allergens. The US Department of Energy has requirements manufacturers must pass to meet HEPA requirements. The HEPA specification requires removal of at least 99.97 of 0.3 micrometres airborne pollutants. Products that claim to be HEPA type , HEPA like , or 99 HEPA do not satisfy these requirements and may have been tested in independent laboratories.
Air purifiers may be rated on: area coverage; air changes per hour, which indicates how frequently the air purifier can exchange all the air in a given room; the clean air delivery rate, which determines how well air has been purified; energy usage; and the cost of the replacement filters.
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