Though we are sliding into heating season, it is never too late to talk about air conditioners. If you want to avoid buying one for the two weeks that it is intolerably hot in the summer or you just like to experiment, here is another option. Make your own!
Better yet, use it as a project for the kids in your life to show how math and physics are great tools for creative people.
Here’s the background on one Engineering student’s cool project, complete with specs:
Lifehacker’s take on the project has some very interesting comments: