The window is the air outlet of every home, so you can't describe it clearly. I feel that the mirror in his window should be facing your window. The mirror in the window reflects the external suffocation, so it will reflect your air into the window, which is not good, but it is not helpful for his so-called venting. Taishan stone can be placed on the windowsill, and two pots of green plants are enough. If you don't feel at ease, you can stick a reflective glass sticker on the window, not too big, just one, and it's foolproof.
No matter what the other person's psychology is, this kind of practice and idea is an act of not planting blessings and doing evil with oneself. What we do every day will be rewarded. As the saying goes, good is rewarded with good, and evil with evil. We say that we can get our own good, depending on what we do.
Kindness is the foundation, and loss is a blessing. Don't care about each other's ridiculous behavior, just laugh it off.
I hope it helps you.