Hi we are thinking about changing our windows and getting rid of the small envelope windows so we can have symmetrical tall windows. However, has anyone regretted this? I’m thinking about security and how you can leave a little window open upstairs at night or during the day. I know the tall windows can be opened/locked a couple of centimetres but that’s not really enough for cool air in warmer weather. I really like the look of tall windows though! Anyone had the same predicament?