HEPA air purifiers are said to be the most efficient air purifiers. HEPA stands for “high efficiency particulate air” which means that a HEPA air purifier can theoretically eliminate from the air at least 99.97% of any particles with a size of 0.3 micrometers or larger. This defines a true HEPA filter in contrast with a near HEPA filter. A near HEPA or “HEPA type” air purifier is the one that did not meet the HEPA requirements and is efficient at 0.3 microns of less than 99.97% but greater than 90%.
HEPA air purifier
The history of HEPA air purifiers began in 1940’s in the United States where a very first HEPA air purifier was developed. Its purpose was to protect against radioactive pollution. It was then modified for people’s private use and introduced into sales within 10 years after the first HEPA air purifier had been constructed. Since the efficiency of HEPA air purifiers was very high, they became very popular among customers worldwide. Even more, a HEPA filter became an officially registered trademark for very effective filters. U.S. Department of Energy has very high stated requirements that companies must pass in order to fulfill the HEPA filter requirements.
HEPA air purifier features
HEPA filters are still used in order to protect the public and the environment against radioactive pollution in nuclear power stations and other high technology industries, such as aerospace, military cleaning rooms and similar objects. As they are highly efficient in clearing the air from harmful viruses and bacteria, HEPA air purifiers are widely used in hospitals, pharmaceutical companies and other health care centers. Due to their ability to eliminate other various indoor allergens, such as dust, mold spores, smoke and pollen from the air, HEPA filters are widely used in the houses to clear the air from the above mentioned particles. Unlike some other air purifiers, HEPA air purifiers are very efficient in getting rid of the unpleasant room odor. Hence they are a first choice for cafes, bars and restaurants in order to eliminate cigarette smoke there. According to the size of a HEPA air purifier and area coverage there are various types of such air purifiers. There are room, home and commercial HEPA air purifiers. Home air purifier is used for private purposes at home. Such air purifiers with a HEPA filter inside can cover a single room or the whole house area. People, who suffer from allergies, asthma or other respiratory disorders, choose HEPA air purifiers.
Room HEPA air purifiers
Room HEPA air purifiers are similar to the home air purifiers but are smaller and covers a smaller area to be cleared. They are more then ideal in bathrooms, kitchens, bedrooms and other parts of the house where air purification is needed. Room air purifiers are more easily used than home air purifiers as they are small, portable and often do not need to be changed.
Commercial HEPA air purifiers
Commercial HEPA air purifiers are the largest air purifiers of the kind. They are used in large commercial areas and greater pollution zones. Such air purifiers are likely to be not portable and are used in hospitals, large technology industries, shopping malls and other similar objects. As mentioned above, commercial HEPA air purifiers are useful not only in protecting public health and environment against radioactive particles but also in clearing the air from cigarette smoke, pollen, dust, mold, unpleasant odor and organic contamination, such as bacteria and viruses. However, HEPA air purifiers are mostly used for commercial purposes. They are constructed for disk drive, clean room, medical device, nuclear, semiconductor, food, pharmaceutical and other industries requiring contamination control.
There are special type filters constructed for hospital applications. These are vector filters, as well as ceiling filters for surgical and patient environments. HEPA filters are indispensable for hospitals where mobile HEPA air purifiers are used for the highest contamination control. They allow clearing the air from any airborne pathogens that may cause airborne infection, such as tuberculosis. HEPA filters can also protect particularly against drug resistant strains. HEPA filtration system reduces the risk of airborne infection for patients, medical staff and other healthcare workers. HEPA air purifiers can be located in isolation rooms, admittance, waiting, emergency rooms and other critical areas of use. They are most effective when placed closest to the source of contamination. This stops the migration of harmful airborne pathogens, and hence stops the spread of airborne infection among patients and healthcare staff. Various techniques are used in HEPA air filters to aim the highest efficiency in clearing the air from different indoor allergens that may be harmful to the public and the environment.
HEPA air purifier cost
There are many different manufacturers that offer different HEPA air purifiers. A small modification may cause a big rise in price, so a customer should be aware that a big price does not necessarily guaranty a greater efficiency in performance. Customers should know that the efficiency of a filter reduces if it is not changed regularly. Therefore, all air purifiers must be tested periodically for a better pollution control. Customers should not forget that “HEPA type” air purifiers have much lower air cleaning effectiveness than true HEPA air filters, hence are cheaper. However, HEPA air purifiers are the most effective ones and their price is affordable. HEPA air purifiers have changed a lot since the original air purifier of such type was first invented. There are various HEPA filters aimed for different purposes. There are a lot of advantages of a HEPA filter. The major ones are high efficiency in performance, which increases with use. A HEPA filter has a long free of maintenance life cycle which can be up to 5 years if used with pre-filter. However, there are a few disadvantages, such as high cost, due to periodic replacement of filters, the price of each ranging from $50 to $100 depending on size. HEPA filters can be rarely used for residential purposes concerning their size and huge power requirements. There is an increased energy cost because of a need for a powerful fan. Despite their huge energy needs and costs the popularity of HEPA air purifiers is steadily rising both in private and industrial areas, since they are the most efficient air cleaning devices of a kind.