I live in a small condo building with two stories. Although we live in so cal it’s a particularly warm microclimate surrounded by open space. I installed AC a few years back because I was suprised by how hot it got. My downstairs neighbors don’t seem to be as bothered by it. I know they are probably cooler because they are downstairs, but is it possible my AC is spending energy cooling their unit too? I cool my air, theirs rise into my unit, etc.