How to choose a good air purifier?

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This post was last edited by cflt111 on 2016-4-7 08:33. How to choose a good air purifier? In autumn and winter, when living in the north, thick fog makes it impossible to go out; how can one choose a good air purifier? When purchasing an air purifier, the filtering efficiency is the first thing to consider. Many people look for air purifiers that can filter PM2.5, but not formaldehyde In fact, many air purifiers have all these functions, but their performance is only mediocre. Air purifiers can be mainly divided into two categories: passive purification. A representative product of passive purification is the electrostatic air purifier, which can only wait for polluted air molecules to freely approach it. One is the purification of air flow; the representative form of activity-based purification is an air purifier that uses filters. Such products rely on wind turbines to draw air through filters, thereby cleaning it before recycling it throughout the room. The second is the area for using the air purifier. Air purifiers come in a variety of series designed for different spaces, and people often overlook this fact when making purchases. Finally, there is the cost of using an air purifier. The cost of use is something that many people tend to overlook when making a purchase. Clean the pre-filter of the air purifier, but some HEPA and activated carbon filters cannot be cleaned and need to be replaced; otherwise, the air purifier may be essentially useless. The typical replacement cycle is around 8 months, though it varies depending on the environment. Many people buy machines that are quite cheap, but the filters used in them are very expensive; they need to be replaced every two or three months, which results in high costs over time.