In recent years, the sales of household air purifier in China increased by 27% each year, influenced by air pollution caused fine particles “PM 2.5”, the sales of Household Air Purifier tends to increase. In 2013, the sales increased to 2.64 million, up 16% over 2012. http://www.marketresearchstore.com/report/in-depth-study-and-prospect-forecast-on-household-air-6829
