Inlet air purifier ranking is not. No bodies have so much authority. You want to know that a brand's market position in foreign countries, you go look up on foreign websites to know. At present, the domestic sales of air purifiers in foreign sales is this: the price of the Swiss IQAir probably between $ 799 ~ 1799, relatively few models, basic household only about 8 to 9 models of it; Canada Allerair prices probably between 374.98 - $ 209.98, more models, probably more than 60 models; Blueair prices in North America between $ 329 to 99, a total of 11 models; Austin priced in North America at 374 between $ ~ 764.99, a total of nine models. Say inlet air purifier rankings, largely so it was, after all, Europe is a relatively mature market, the prices of commodities in general can reflect its intrinsic value. In fact, these rankings do not make much sense. I think it mainly depends on your needs, these brands of air purifiers, have their own characteristics. Just IQAir in removing particulate contaminants little stronger, Allerair belong on PM2.5, formaldehyde and other harmful micro-organisms and harmful gases can be removed chemically versatile, Blueair and Austin in the removal of dust, secondhand smoke, pollen, animal dander, etc. particulate pollutants quite good. German air purifier import customs agents imported German air purifier air purifier German customs agents import customs agents air purifier declaration Hotline: ①⑤⑧①④③⑦⑥③⑥⑦ Online QQ: 1914998850 food (wine, olive oil) import declaration Information: www.ephen1020.com Guangzhou food import declaration: www.gz-baoguan.com used machine import declaration: www.jinkou-jx.com wine import customs clearance agent: http: //www.hj-qingguan.com/