The neighbor next door installed air conditioners on the stairs and installed two sets. When the weather is hot, he turns on the air conditioner, and he is cool. The whole staircase is very hot.

Hehe, judging from your picture, you should live in an old community, and it is estimated that there is no property company in the community. I suggest you talk to the other party first, and suggest that he put the outdoor unit of the air conditioner outside, because the household air conditioner exchanges heat through air, and what is needed is an air circulation environment, which will definitely affect the heat exchange. Although on the surface, the outdoor unit will not suffer from wind and rain in the corridor, which prolongs the service life of the air conditioner. In fact, due to poor air circulation, long-term use will worsen the heat exchange environment of the outdoor unit, increase the load of the air conditioner compressor, and make the air conditioner run in bad working conditions. This will not only greatly reduce the service life of air conditioners, but also increase the power consumption of air conditioners. I really don't know how the installer of this air conditioner was installed in this position at the beginning. He is either a novice or trying to save trouble. Another possibility is that he is insane. If the coordination between you is not good, then go to the neighborhood Committee to coordinate. Air conditioning is installed in the corridor, which will not only produce the situation you described, but also produce a lot of noise. I hope I can help you!