I prefer temps about 3.5C lower. My ideal indoor work temp is 17.5C +-1. At 23, my brain is noticeably groggy.

It’s endlessly fascinating how different we can all be.

Are you overweight?

Nope. I just run hot. I’m built for long dry winters with a lot of ice and snow.

I'm thinking there is a lot of context here I am missing as a layman. you can shift all the zones (including comfort zone) up and down the chart by adjusting the "mean outdoor temp" slider. people don't really work that way, unless we are assuming that they keep wearing their outdoor clothes inside maybe?