This article is about the air purifier. For the psychiatric treatment, see Negative air ionization therapy. This photo shows the sterilisation effects of negative air ionization on a chamber aerosolised with Salmonella enteritidis. The left sample is untreated; Photo taken in a lab operated by the United States Department of Agriculture. An air ioniser (or negative ion generator or "Chizhevsky's chandelier") is a device that uses high voltage to ionise (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in a net positive charge. Most commercial air purifiers are designed to generate negative ions. Another type of air ioniser is the electrostatic discharge (ESD) ioniser (balanced ion generator) used to neutralise static charge. In 2002, Cecil Alfred 'Coppy' Laws was credited with being the inventor of the domestic air ioniser in an obituary in The Independent newspaper.

Air ionisers have been used to eliminate the occurrence of air-borne bacterial infections and to reduce static electricity buildup in electronics. Air ioniser and purifier with its dust collection plates removed Air ionisers are used in air purifiers to remove particles from air. Airborne particles are attracted to the electrode in an effect similar to static electricity. These ions are de-ionised by seeking earthed conductors, such as walls and ceilings.To increase the efficiency of this process, some commercial products provide such surfaces within the device. The frequency of nosocomial infections in British hospitals prompted the National Health Service (NHS) to research the effectiveness of anions for air purification, finding that repeated airborne acinetobacter infections in a ward were eliminated by the installation of a negative air ioniser—the infection rate fell to zero, an unexpected result. Positive and negative ions produced by air conditioning systems have also been found by a manufacturer to inactivate viruses including influenza.

The SARS epidemic fueled the desire for personal ionisers in East Asia, including Japan (where many products have been specialised to contain negative ion generators, including toothbrushes, refrigerators, air conditioners, air cleaners, and washing machines). There are no specific standards for these devices. Ionisers are distinct from ozone generators, although both devices operate in a similar way. Ionisers use electrostatically charged plates to produce positively or negatively charged gas ions (for instance N2− or O2−) that particulate matter sticks to in an effect similar to static electricity. Even the best ionisers will also produce a small amount of ozone—triatomic oxygen, O3—which is unwanted. Ozone generators are optimised to attract an extra oxygen ion to an O2 molecule, using either a corona discharge tube or UV light. At concentrations that do not exceed public health standards, ozone has been found to have little potential to remove indoor air contaminants.

[3] At high concentrations ozone can be toxic to air-borne bacteria, and may destroy or kill these sometimes infectious organisms. However, the required concentrations are sufficiently toxic to humans and animals that the US FDA declares that ozone has no place in medical treatment[4] and has taken action against businesses that violate this regulation by offering therapeutic ozone generators or ozone therapy.[5] Ozone is a highly toxic and extremely reactive gas.do air purifiers help sleep apnea[6] A higher daily average than 0.1 ppm (100 ppb, 0.2 mg/m³) is not recommended and can damage the lungs and olfactory bulb cells directly.air purifier cebu city A number of studies have been carried out on negative ion generators. air purifier mildew smell

Some studies show that the ozone generated can exceed guidelines in small, non ventilated areas.[7] One study showed that ozone can react with other constituents to increase pollutants such as formaldehyde. Consumer Reports, a non-profit US-based product-testing magazine, reported in October 2003 that air ionisers do not perform to high enough standards compared to conventional HEPA filters. The exception was a combination unit that used a fan to move air while ionizing it. In response to this report, The Sharper Image, a manufacturer of air ionisers (among other products), sued Consumer's Union (the publishers of Consumer Reports) for product defamation. Consumer Reports gave the Ionic Breeze and other popular units a "fail" because they have a low Clean Air Delivery Rate (CADR). CADR measures the amount of filtered air circulated during a short period of time, and was originally designed to rate media-based air cleaners. The Sharper Image claimed that this test was a poor way to rate the Ionic Breeze, since it does not take into account other features, such as 24-hour-a-day continuous cleaning, ease of maintenance, and silent operation.

The United States District Court for the Northern District of California dismissed the case, reasoning that The Sharper Image had failed to demonstrate that it could prove any of the statements made by Consumer Reports were false. The Court's final ruling in May 2005 ordered The Sharper Image to pay US $525,000 for Consumer Union's legal expenses. Air ionisers are sometimes used in places where work is done involving static-electricity-sensitive electronic components, to eliminate the buildup of static charges on non-conductors. Grounding with ground straps or other methods eliminates static buildup on conductors, but not non-conductors.There is much confusion in the air purifier market about the difference between air purifiers, ozone generators and ionizers. Because the Environmental Protection Agency doesn t regulate the sale of air purifiers, there is a huge need for the public to be aware of what each product does and whether or not purchasing an air purifier will actually help reduce your home s indoor air pollution.

Some do and some don t. Ionizers are generally the same as a typical air purifier in that they have several layers of filtration to clean your indoor air. They differ in the fact that they attach negatively charged ions onto positively charged dust and allergen particles. By attaching to the dust, the negatively charged ions cause the particles to drop out of the air in front of your ionizer unit. This element of an ionizer s air filtering process means you'll need to vacuum the floor around the unit frequently. Ionizers sometimes produce excess ozone as well. Ozone is a gas that occurs naturally in our atmosphere and unnaturally at ground level. When it occurs naturally in the atmosphere, ozone acts as a protective layer against the sun s harmful UV rays. Nearer to ground level, ozone is created when air pollutants expelled from power plants, cars, etc., react chemically to the sunlight   hence ozone creation is more common during summer months. Ground-level ozone is harmful to the respiratory system, especially your lungs.

according to the Environmental Protection Agency, ozone has been known to reduce lung function, exacerbate asthma and make your lungs more vulnerable to infection. With all of the research against the creation and inhalation of ozone, it amazes us that ozone generator manufacturers still produce and market their products as air purifiers. They may still have the some of the same technology as an air purifier, but because they also crate ozone, they should not be used by anyone suffering from asthma, or by health-conscious individuals. Ozone generators are mainly marketed for their ability to remove unwanted odors from a room. This is very true; the creation of ozone does eliminate pesky cooking, pet-related or smoke odors. In fact, when ozone is released in your home it will smell just like it does after a thunderstorm, fresh and clean   that smell is ozone. However, if you are truly looking to purify the air, look closely for air purifiers that advertise ozone-free technology.

The scary truth is that many devices in your home produce ozone byproduct   anything with an electrical motor like TVs, computers, electric mixers, hair dryers and ceiling fans. The Food and Drug Administration and EPA regulates most of these types of products, requiring ozone output to be no more than 0.05 ppm. Air purifiers are not regulated as most home appliances are, thus there is a danger that the unit could be producing excess ozone. When purchasing an air purifier, look for a filter that is UL listed, has an ETL mark or is certified by the Association of Home Appliance Manufacturers. All of these organizations, though not government run, are independent companies that test for safe levels of ozone production and compliance with other safety codes. , www.epa.gov and www.airnow.gov to read the latest research. ProForm Smart Strider 935 Great reviews, articles, & videos are coming your way! Assisted Living Community vs. Living at Home: A Cost Comparison Considering whether or not you should put your elderly loved one into an assisted living community is a difficult decision, and not just because...

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