The removal of borders on buttons. I don’t know how many times I’ve been using a piece of software and haven’t realized for a long while that some icon is actually a clickable thing and not just some UI decoration or something.
The removal of text in favor of icons. I hate having to memorize what all your icons mean in your app. Please just make text unless it’s something insanely obvious. It’s even worse when they neglect to put tool tips to tell you what the icon is supposed to mean
Mathias Wandel on YouTube made some good videos a few years ago about maximizing airflow through a house with fans. One big finding was that rather than having a fan directly in a window or door pointing out it is actually best to have it a few meters away and directed at the opening. That allows the fan’s airstream pull in and start moving much more air in the room out the opening. He used strips of paper hanging in doorways around the house and also I think took anemometer readings to get good measures of the airflow.
I think the general theory is to run the fans starting in the evening once the air temp outside is lower than inside, then close up the house in the morning to trap the cool overnight air?
https://youtu.be/1L2ef1CP-yw?si=aLTlAMKv_3p3ri2q I think he may have made multiple videos on the topic