This room is small and stuffy. What should I do?

I wonder what brand of purifier you use. Should be effective. You said there may be two reasons why the effect is not good. 1 There are too many harmful substances in your room, and 2. The purifier you chose is not effective. Generally speaking, don't choose domestic brands. After all, domestic purifiers have a short history. I suggest you choose a European brand. There are other situations, that is, you are a very sensitive person. You can try the Japanese negative ion generator, which I believe will improve your situation. By the way, although the price of imported machines can be higher, the effect is always real, which is better than buying a cheap one without effect. If you want to choose a machine, purify a room of 20 square meters, and the air output is more than 200 cubic meters, regardless of the area advertised by the machine. It is a fool to say that the air output of domestic machines is 100, and it is too easy to purify 40-50 bungalows. In a word, you can find out the reason yourself. You can also put two pots of aloe in the room, which also has a good purification effect on the air.