By Philip Schmidt, Networx

Don’t worry: You won’t have to endure a lecture on thermodynamics to understand how to cool your home more efficiently. In fact, there are only two basic scientific principles that you need to know, and you’re sure to be familiar with at least one of them. The first is: heat follows cold. The second is: hot air rises. Thinking about these two rules of nature will help you see how air moves in and around your house and how that relates to cooling (and heating) efficiency.