Which air purifiers use hepa 13?

(1) purification technology is the primary factor that should be considered when purchasing air purifiers. At present, the purification technology includes the following four categories: physical filtration, represented by activated carbon and HEPA mesh filtration technology, is the safest and most efficient filtration method at present; Chemical decomposition and filtration represented by photocatalyst and cold catalyst technology can decompose harmful gases while purifying; Ion technology, represented by negative ion and silver ion technology, can sterilize and effectively purify the air; Electrostatic dust removal, mainly electronic dust removal, will produce ozone and bring secondary pollution. Summary: To choose an air purifier that applies physical filtration, chemical decomposition filtration and ion technology, physical filtration technology is the first choice. In order to ensure the purification effect, try to choose an air purifier with multiple purification technologies. Avoid choosing an air purifier using electrostatic dust collection technology. (2) Different filtration grades have different purification effects. The higher the grade of HEPA mesh, the smaller the diameter of particles that can be filtered, and the better the filtering effect. At present, the common air purifiers in the market use the HEPA net of H 10H9 grade, the high-end air purifiers generally use the HEPA net of H 12 grade, and a few high-end air purifiers use the HEPA net of H 13 grade. The HEPA net with the grade of H 13 is the top imported medical-grade purification soft HEPA filter with the best filtration effect. Therefore, at least choose an air purifier with a HEPA net grade above H 12, and try to choose an air purifier with a HEPA net grade of H 13. (3) The greater the air cleanliness (CADR), the larger the purification area of the air purifier and the more purification cycles. The international standard is 5 cycles per hour. For example, there is an air purifier with a clean air volume of 450m? /h, based on the room height of 3m, the applicable area of the air purifier is 450 ÷ 5 ÷ 3 = 30m2. When purchasing, we should consider whether the clean area of the air purifier matches the room area. If the cleaning area is smaller than the room area, the expected cleaning effect will not be achieved. So try to buy an air purifier with a large amount of clean air. (4) Purification Efficiency = (Number of particles in the air inlet? The number of particles in the air outlet)/the number of particles in the air inlet, and the product quality and purification effect can be directly seen by the first purification effect. When purchasing, consumers should not only consider the one-time purification efficiency, but also consider the whole purification efficiency, that is, the air purification quantity, otherwise it is easy to fall into the trap of merchants: for example, to purify the same volume of air, the one-time purification efficiency of both purifiers is 99%, but purifier A took 1 hour and purifier B took 2 hours. Obviously, the purification efficiency of A is higher than that of B, but the merchants did not mark the test parameters, and what you saw was 99%. In addition, the efficiency of air purifiers is different except PM2.5 and in addition to formaldehyde, so the values of both should be considered comprehensively when purchasing. Finally, it should be considered that the values of purification efficiency are all tested in the specific experimental environment of the manufacturer. Because the indoor air environment is different from the laboratory environment, consumers should not blindly listen to the manufacturer's imaginary value when buying, but should see whether the effect is really effective. (5) Real-time display of PM2.5 value Some air purifiers on the market can't display the content of PM 2.5 in the air, and some can be roughly displayed by "excellent, good, medium and poor". A few high-end air purifiers can display the accurate value of PM 2.5 in the air in real time, and users can intuitively see the changes of indoor air quality. (6) fuselage structure At present, the air inlet and outlet modes of air purifiers are mainly divided into: air inlet at the back and air outlet at the front: this mode is easy to blow the dust on the floor and aggravate the dust in the indoor air; Below or behind the wind, above the wind: this can suck the dust on the floor into the air purifier for purification, and then blow out fresh air from above to play the role of "cleaning the floor", especially if there is a baby at home, the baby likes to climb on the ground, and more attention should be paid to floor hygiene. (7) Safety-secondary pollution Air purifiers using electrostatic precipitation and pure negative ion technology will produce ozone, which is often referred to as the secondary pollution problem of air purifiers. A certain amount of ozone can kill bacteria and viruses and decompose gaseous pollutants, but excessive ozone is harmful to the body, affecting the lungs, leading to asthma and serious cancer. At present, the safest and most effective technologies are HEPA net technology and activated carbon technology. Both electrostatic precipitation and pure ion technology will produce ozone. When purchasing, you should choose an air purifier with HEPA net filtration and activated carbon technology. (8) Noise problem Noise problem is a common problem in the use of air purifiers. When purchasing, the noise problem is mainly considered from the following three aspects: whether the sleep mode can really be ultra-quiet; Whether the noise generated at the maximum air volume can be tolerated; Whether the noise in automatic mode is acceptable. Some purifiers use DC brushless ultra-quiet motor and additional quiet cotton technology, which can effectively reduce noise. When purchasing, you can give priority to air purifiers that use these two mute technologies. (9) Under the same purification effect of power consumption, the smaller the power of the air purifier, the less the power consumption. In addition to power, some air purifiers are also equipped with automatic mode, which can automatically adjust the air volume according to indoor conditions, thus achieving the purpose of saving electricity and prolonging the service life of filters. When purchasing, you should try to choose an air purifier in automatic mode. 3. In addition to the technical indicators, the problems encountered in the use of the air purifier should also be considered when purchasing. First, it depends on whether the design is humanized and the operation is simple and convenient. Some people buy air purifiers for their parents, and as a result, their parents can't use them. Therefore, whether the design of air purifier is humanized is also a factor to be considered when purchasing. Some high-end air purifiers have visual screens, which can directly see the value of PM2.5, which is simple and convenient. There is also a child lock design to prevent children from being inappropriate. Secondly, we should consider the replacement of filter and after-sales service. 4. Comprehensive consideration of purchase After considering the above three aspects, the purchase of air purifiers should also be considered comprehensively, such as whether the manufacturer is a professional manufacturer of air purifiers, and pay attention to distinguishing OEM manufacturers; Whether it is really effective in the real environment; Is it safe without secondary pollution? In addition, cost performance, word of mouth, brand strength, service and other factors need to be considered. The above are the four steps in purchasing an air purifier. If you do the above four aspects when shopping, I believe it is not far from choosing a good air purifier. I hope it will help everyone and cheer for respiratory health.