Air-purifiers are simple time-telling equipments that purify the contaminated air by freeing it from unnecessary pollutants. The working of the air-purifiers is simple. They draw in contaminated airs, absorb the contaminants from the unclean air thereby purging the air inside the filter and releasing it effectively into the atmosphere outside. In a nutshell, the air-purifiers not only remove the harmful particles from the air, but also provide protection against hazardous smoke particles and airborne gases. So get an air-purifier to clean the atmosphere in your home and office. The air-purifiers are can alleviate asthma and other respiratory diseases, removing the allergens causing these diseases. The cleaning of the air is done by reducing the dust floating in the air, filtering second hand smoke and purifying the air out of every chemical pollutants, car exhausts, fumes and other polluting contaminants. It is the impure air filled with unnecessary pollutants that are creating respiratory disorders even in small children and newborn babies. So the air-purifiers provide the most effective means of clearing the air and that also well within your budgetary limits. With the consumer demand for air-purifiers rising high, the companies have stepped-up the production of air-purifiers. They have even introduced new techniques like advanced filters, charcoal absorbents, and electrostatic charges in the air-purifiers. So the extent of purifying your air depends upon your choosing the right kind of air-purifier for your home. Whether you want a mechanical air purifier like the HEPA systems, or electrostatic filtration purifiers like ionic purifiers or a combination of both, carbon-operated air-purifiers or ultra-violet light devices, you have to decide for the air-purifier that will best suit the needs of your home. The different types of air-purifiers that are available in the market are HEPA filter air-purifiers, carbon air-purifiers, ozone air-purifiers, ionic air-purifiers and ultraviolet light air-purifiers. Following are the benefits and disadvantages of various air-purifiers: HEPA air purifiers Advantages ? the allergens are captured and not released into the air once they are trapped. Disadvantages ? does not eliminate chemical fumes, cigarette smokes, odors and gases. Carbon air-purifiers Advantages ? highly effective in cleaning atmosphere of chemicals, gases, smokes and odors. Disadvantages ? not at all effective in capturing microorganisms and allergens. Ozone air purifiers Advantages ? truly effective for removing odors, cigarette smells, and chemical fumes Disadvantages ? not effective for allergens and most of the chemicals Ionic air-purifiers Advantages ? capable of removing extremely fine particles almost anywhere in the rooms even those that are several feet away from the air-purifiers. Disadvantages ? does not kill germs but removes them completely from the household air and not at all effective on odors. Ultra-violet light air-purifiers Advantages ? aids in the destruction of microorganisms that cause diseases. Disadvantages ? not at all effective for removing smoke particles, odors, industrial/household chemicals and allergens. Get any of these air-purifiers now to clean the atmosphere in your home/office and lead a healthier life.