- Choose the right purchase channel
When buying an air purifier, it is recommended to buy it in formal channels such as large shopping malls, electrical appliance stores, brand stores and mainstream e-commerce websites. As of 2013, air purifier brands, features, performance, designs and prices are very different, which is dazzling. It is recommended that consumers choose products according to their actual needs, not the more functions the better. For example, for consumers who need to protect PM2.5, it is recommended to choose a pet air purifier with outstanding PM2.5 purification ability. Newly renovated homes can focus on air purifiers with outstanding ability to remove formaldehyde and toluene.
- Filtration technology
Particulate pollutant filtration technology is mainly HEPA filter, HEPA filter quality is uneven, some small brands of filter although it has a high filtration efficiency, but the resistance is large, the energy efficiency ratio is relatively low, and it is easy to block, the life is short. It is generally recommended to choose a deep dust-holding HEPA filter with an electrostatic electret, and the electrostatic electret technology makes the non-woven fibers have positive and negative electricity, effectively capturing particulate matter in the air, and many HEPA filters are known as having electrostatic electret technology. However, due to technical reasons, the electret charge of many filters will decay quickly in a short period of time, resulting in a decrease in filtration efficiency.
- Pay attention to the applicable area or the amount of clean air (CADR) of particulate matter
The strength of the purification capacity of the air purifier is mainly determined by the applicable area and the amount of clean air particulate matter (CADR: the rate of clean air provided), and the relationship between the two is: the applicable area = CADR×0.1. The purification capacity of other pollutants should be combined with the applicable area.
- Energy efficiency ratio and energy efficiency level
Air purifiers are usually used continuously for a long time, and the energy efficiency ratio is an important indicator to measure the purification capacity and power consumption of air purifiers, which deserves everyone's attention. The higher the energy efficiency ratio and energy efficiency level, the more energy-efficient the air purifier and the lower the cost of use.
- Ozone release
Ozone as a strong oxidant has a certain purification ability, but it is harmful to the human body. The country has mandatory safety requirements for the release of ozone from air purifiers, limited to 10-6% of ≤5× (ozone has a fishy smell).