"... I think anyone who reads HN who needs to be told to open windows in order to keep cool should maybe hand in their hacker badge. ..."
It really depends. On the really hot days having a window open increases the interior temperature if the previous days have been cooler. On successively hot days leaving the window open decreases the interior temp but only if there is a wind.
I don't know what latitude where you come from since you don't have any identifying information but being smart has nothing to do with understanding how to keep cool. It comes from local knowledge. If you come from the continental Europe or the UK I'd guarantee you'd miss half these hacks due to the heat.
It really depends. On the really hot days having a window open increases the interior temperature if the previous days have been cooler. On successively hot days leaving the window open decreases the interior temp but only if there is a wind.
I don't know what latitude where you come from since you don't have any identifying information but being smart has nothing to do with understanding how to keep cool. It comes from local knowledge. If you come from the continental Europe or the UK I'd guarantee you'd miss half these hacks due to the heat.