Anyone who claims to be able to treat or purify moxa smoke only uses filtration, static electricity, active substance adsorption and other methods to reduce or remove particles (such as PM2.5 or PM0) in the smoke. It seems that there is no smoke. However, it is not only the particulate matter that is the most harmful in the cigarette, but some gases produced by burning the cigarette, such as nitrogen oxides, carbon monoxide, sulfides, benzene and formaldehyde (you can check online whether these gases can be filtered or not), which cannot be simply treated by electrostatic filtration. The accumulation of these gases indoors is extremely harmful to the body. In the so-called moxibustion room purified in moxa smoke, the smell is not only very unpleasant, but also dazzling and suffocating. Therefore, pure filtration, static electricity and adsorption cannot remove cigarettes. You only need to buy an air detector in 48 yuan in the market to test it, and you will know the so-called effect of treating moxa smoke. So outdoor moxa smoke is the best choice.