[pandaman]

From what I understand, windows in Europe are very different than in the US - they don't slide open but swing, like doors. So an American window unit, which seals the window opening, is not feasible. They have portable units with air hoses, but I am also not sure how you can get such a hose out of a swinging window without leaving a big gap for the hot air to come back.

[wnevets]

Those type of windows exist in America and for $20 you can buy a kit for them on Amazon.

[pandaman]

"A kit for them" to do what?

[wnevets]

To prevent the cold air from escaping.

[pandaman]

I see, all I found is a piece of cloth you tape around window opening though. I don't think it's doing a great job of insulation, and, paired with an inefficient portable unit, what kind of temperature difference can you get inside vs outside?

[wnevets]

> what kind of temperature difference can you get inside vs outside?

Enough to prevent death. When I was growing up we used duct tape and cardboard boxes.

[pandaman]

It really makes no sense. Death from heat is caused by the absolute temperature, not a difference. If it's 30C outside and you can get get 10C difference then it's 20C inside, which is not going to cause death per se so it's "enough to prevent death" but if it's 40C and you are getting the same 10C difference it's 30C inside which is likely to kill frail people.