ELi5 Why do we out air conditioners in windows?

Question

I have a portable one that has a hose thing that goes to a window but I don’t understand why it’s necessary. Is it?

In: Technology

Answer 1

Also, this is the worst type of portable AC. I would recommend a window unit, if possible. See [this](https://youtu.be/_-mBeYC2KGc) video for more information as to why they are so bad.