The use of air purifiers to improve indoor air quality, create a very effective method of health and comfort of the office and residential environments. Can use the air purifier in the bedroom, office, and many other places. One of which is the most energy-saving air purification methods, and spend a lot of energy because of the increase in fresh air to improve indoor air quality: the outdoor air coming in heating or cooling to room temperature. Therefore, in some developed countries of Europe and the United States, buildings with HVAC systems, the use of air purifier to further improve indoor air quality. In general, indoor air purifiers from the shell, the purification of four parts, fans, electric control composition. Play a major role purification and fan section. 
 Currently on the market can see the basis for dozens of different mechanisms, different means of air purification air purifier may generally be divided into mechanical, electrostatic, negative oxygen ions type, physical adsorption, chemical adsorption, or the first of several forms of two or more forms of combination. 
 The purchase of indoor air purifiers to consider the price of this factor, but also consider the following factors: 
 1, according to its own conditions of use options, such as room size, conditions, requirements, and so on, select the appropriate model. 
 2, the purpose of use requirements. Such as odor, smoke removal or eliminate indoor harmful gas, and other requirements. 
 3, at the same time depends on the credibility of the product, whether through the detection of some of the testing department. 
 4 To check the quality of the outer and the use of functions.