HEPA stands for High Efficiency Particulate Arrestor. It is a type of air filter used for cleaning the air especially in equipment such as vacuum cleaners. These air-purifiers filter the particles in the airborne environment down to 0.3 microns in size and at 99.97% efficiency. These highly efficient HEPA purifiers have largely replaced other outdated types of air filters. They not only purify the air but also remove even the smallest microns of allergens like dust, smoke, pollen, animal dander, bacteria and industrial chemicals effectively from the atmosphere. How HEPA Works The HEPA air cleaners work by filtering the allergens in the air through a HEPA air-filter that traps the particles allowing the clean air to return to the atmosphere. The quality of the air improves each time the air cycles through the HEPA filter. HEPA filters are regarded as the most tried and true air cleaning devices available. The best part about HEPA air-purifiers is that they never emit any byproducts or secondary pollutants such as ozone or ions. The main instrument that makes the HEPA purifiers work so efficiently is the fan inside the filter. The fans aid in the trapping of large particles in the fold of the filters while the small particles and chemicals get attached to the charcoal in the filter. Some of the HEPA air-purifiers have fans that have a straight design where the air is drawn in from the back of the purifier and blown out through the front of the purifier. Others have multi-directional fans that pull the air from all sides of the machine and blow the filtered air out in all directions. These types of HEPA air-purifiers are especially useful for purifying the air in the entire home. So whether it's large particles or smaller ones, HEPA air-purifiers can clean the atmosphere completely. Types of HEPA air-purifiers HEPA air-purifiers come in two basic configurations: standard with traditional electric motors, and the PLUS systems featuring G.E. ECM Variable Speed, low energy motors. Both of these systems work with a digital motor technology that is unavailable in other whole-house filtration systems. The HEPA air-purifiers clean the atmosphere of the entire home effectively and efficiently. Benefits of HEPA air purifiers With their effective technology, HEPA air purifiers have become a standard and dependable technology for delivering clean air. They have reached a level of effectiveness that is required in hospital surgery rooms and in other applications where the removal of harmful respiratory particles is critical. Following are the benefits of HEPA air-purifiers: -The compact design enables the purifiers to be easily installed in the homes. -The patented by-pass approach allows for installation on any heating/cooling systems. -The self-balancing air flow design adds no resistances to the flow of air. -The three matched designed air filters like pre-filters, carbon air filters and HEPA air filters help in fast and instant filtering of air. -These air filters are highly portable and can be installed anywhere in your home. Get HEPA air-purifiers to feel the difference in cleaned air in your home or office.