Did you really buy the right air purifier? Heavy metals brought by pet dander, smoke, second-hand smoke, paint, dust mites, formaldehyde and other decoration materials may make indoor air quality worse than outdoor air, and even cause "air pollution" 2-5 times more serious than outdoor air.
Just in the face of a dazzling array of air purifiers, even if most consumers do their homework before buying, they may still be misled by all kinds of exaggerated publicity, start with products that do not meet the demand, or blindly pursue the high CP value of "lifelong consumables-free or 10 years filter-free". As a result, the air purifier cannot exert its maximum filtration efficiency and can only be reduced to a display or a placebo. In order to effectively improve the air quality at home through air purifiers, consumers should return to the quality of filter screens, as well as CADR (clean air output) and CCM (cumulative purification).
In addition to the single filtration efficiency, it depends on the clean air output rate of CADR. Many consumers are familiar with HEPA (High Efficiency Particulate Air), and usually emphasize the familiar "one-way efficiency" of 99.97% and 99.99%, that is, the proportion of dirty particles in the air can be filtered once. However, matching HEPA filter is not necessarily equal to a good air purifier. Clearly marking CADR (clean air value) and the corresponding number of applicable terraces, and good air circulation effect are the selection indicators closer to the use requirements.
CADR (clean air quantity) refers to the clean air quantity produced by air purifier in a certain time and space. Generally speaking, two cleaning efficiency units, namely, how many cubic feet per minute (CFM) or how many cubic meters per hour (CMH), are the most common (the value of the latter is 1.7 ~ 2 times larger than the former, so which unit should be marked when purchasing). In other words, the greater the CADR value, the more clean air can be produced in the same time.
If the air purifier wants to achieve high CADR value, it not only needs the filter screen to have certain filtration efficiency, but also needs high permeability and high air volume. In addition, because the air filter is a product that needs to be turned on for a long time, it is also important to resist low pressure to avoid the burden on the body when operating.
3M, which enjoys more than 200 patents on electrostatic filtration technology in the world, has always performed well in ventilation, air output and low pressure resistance. Under the minimum recommended number of applicable stairs, the air can be changed 6 times per hour at the earliest, which is equivalent to circulating indoor air every 10 minute after startup. Open for a long time, which can give consideration to the air purification effect of filtering and energy saving.
CCM index is closely related to whether a filter is "long life" and "multiple filtration". Besides CADR, there are CCM. CCM (Cumulative Purification Capacity) is an index related to the bearing capacity of pollutants to be filtered and the effective life of filter screen. It is defined as the total weight of pollutants that can be filtered by the filter screen when the filtration efficiency of the purifier is reduced to 50%, and the unit is mg. Compared with CADR's emphasis on clean air that can be output in a certain period of time, or the air circulation efficiency of air purifier, CCM can better reveal the dirt resistance and life of filter elements.
For the long-acting electrostatic filter newly introduced by 3M, in addition to maintaining the characteristics of high air permeability and low pressure resistance, the fiber of the filter has become more detailed through the improvement of technology. Because more fibers are woven into the filter screen under the same surface area, compared with the existing 3M filter screen, its pollutant carrying capacity and effective service life are increased by 2 times. The 3M long-acting electrostatic filter can also greatly improve the average effective life of the old filter, reaching 1.4 years.
To meet the best interests of breathing, 3M long-acting electrostatic filter will become the whole series of double-clean series air purifiers newly launched by 3M, a new market star. It uses a long-term electrostatic filter and strives to meet the best interests of consumers' "breathing" with four advantages:
The air circulation range of CADR quick-cleaning long-acting filter CCM is wider, and the improvement of allergy is the most important feeling. On the whole, to choose the most suitable air purifier, we should not only pay attention to the CP value of the air purifier itself, but also avoid blindly pursuing the single filtration efficiency close to 100%, and we should not ignore the two indicators of CADR (clean air output) and CCM (cumulative purification quantity).
In addition, consumers should also have a reasonable expectation of the service life of the filter, and avoid excessive superstition that "zero consumables or 10 years do not need to replace the filter" in order to really buy an air purifier that can effectively improve the air quality in the home. ?