The low-end purifier with 20000 air volume is 8000 yuan, and the purifier with 25000 air volume is 9500 yuan. The high-end air volume is more than 20,000, and the cheapest high-end purifier is 20,000 each. See if you can bear this price. . . The low-end is Henan Honghe environmental protection lampblack purifier, and the high-end is Super Eight lampblack purifier. You can pay attention to the "Honghe Environmental Protection" website.