Right but you can't jump from that to assuming that US homes are nicer to live in - the difference is at least partly because more solid construction, traditional styles, and environmentalist design mean that German homes passively hold a comfortable temperature better than US ones. Air conditioning is a very brute-force solution to the problem and it comes with a significant downsides (noise, dry air that you then have to add more appliances to address, ugly, have to keep your windows closed...).