Indoor air is full of particles, and in fact, most of the mass in the particles is in the larger particles & not in the tiny pollens. In absence of a pre-filter in any air purifier, the higher efficiency and expensive HEPA/ULPA filters will clog up with big particles quickly. Even though HEPA/ULPA filters have a large number of pleats which gives them lot of surface area, they can fill up more quickly if the larger particles are not pre-filtered out. In a typical family, with kids, dogs or cats, and a lifestyle that’s highly active, an air purifier has to deal with a lot of large particles. Pets are not the only ones with dander. Our customers using an air purifier for the first time are typically surprised at how much human hair is caught in the pre-filter. That’s one of the main reasons that the pre-filter on your air purifier should be changed, or at least checked according to the prescribed schedule. Pre-filter installed in our purifiers are washable so there is no need to change it.
An electrostatic precipitator (ESP) is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit. In contrast to wet scrubbers which apply energy directly to the flowing fluid medium, an ESP applies energy only to the particulate matter being collected and therefore is very efficient in its consumption of energy (in the form of electricity) Our Air purifiers are equipped with S. Steel ESP to trap very ﬁne particles with eﬃciency of 99.9%.
A molecular sieve is a material with pores (very small holes) of uniform size. These pore diameters are of the dimensions of small molecules, thus large molecules cannot be absorbed, while smaller molecules can. Many molecular sieves are used as desiccants. Some examples include activated charcoal and silica gel. Molecular sieves are used as adsorbent for gases and liquids. Molecules small enough to pass through the pores are adsorbed while larger molecules are not. It is different from a common filter in that it operates on a molecular level and traps the adsorbed substance. Because of this, they often function as a desiccant. A molecular sieve can adsorb water up to 22% of its own weight. The principle of adsorption to molecular sieve particles is somewhat similar to that of size exclusion chromatography, except that without a changing solution composition, the adsorbed product remains trapped because, in the absence of other molecules able to penetrate the pore and fill the space, a vacuum would be created by desorption.
An HEPA/ULPA filter can remove from the air at least 99.999% of dust, pollen, mold, bacteria and any airborne particles with a size of 120 nanometres (0.12 micron) or larger. HEPA filters satisfy certain high standards of filtration efficiency such as those set by the United States Department of Energy (DOE). To qualify as HEPA by government standards, an air filter must remove 99.97% of all particles greater than 0.3 micrometer from the air that passes through. HEPA filters trap small particles that may cause problems for allergy sufferers and others with health problems. Reducing or eliminating those particles will make cleaner air at your home , work place and specific process requirements.
Carbon filtering is a method of filtering that uses a piece of activated carbon to remove contaminants and impurities, utilizing chemical adsorption. Each piece of carbon is designed to provide a large section of surface area in order to allow contaminants the most possible exposure to the filter media. This carbon is generally activated with a positive charge and is designed to attract negatively charged water contaminants. Carbon filtering is commonly used for water purification. But it is also an active component in air purifiers. Carbon filters are most effective at removing chlorine and Volatile Organic Compounds (VOCs) from air.
A Photo catalytic Oxidation (PCO) air purifier uses short-wave UV light to sterilize and remove upto 99.9% of bacteria and viruses from air. It is also effective in eliminating contaminants such as bacteria, viruses, mould and Volatile Organic Compounds. PCO filters use a Titanium Dioxide plate (TiO2) irradiated by intense ultraviolet light. This produces radicals capable of breaking down smaller particles, chemicals and odours thus removing them from indoor air.
UV Sterilization involves the use of Ultraviolet light which destroys the DNA of microorganisms. Unlike filters which collect pollutants as they pass through the purifier, the purpose of UV light filter in air purifier is more specific they are meant to eliminate organic matter such as bacteria, mould, and viruses. UV radiation in appropriate doses is deadly to disease causing microorganisms. When they pass through the UV purifier, they are exposed to the UV radiation and are destroyed. UV filter in air purifiers helps sterilize the air. This is highly beneficial in medical facilities, burn homes, hospitals and homes with infants, old people and convalescing patients. It effectively prevents the spread of air borne infections.
Negative ions are negatively-charged electrical particles that are attracted to allergens and other airborne contaminants, which are positively-charged. Ionization creates larger particles which settle harmlessly to the floor and get removed from the air we breathe. Air purifiers generate Oxygen atoms with an extra electron and these have positive health benefits.