If you live in an older neighborhood in the Valley, you may have noticed many of the houses in your area have two box-like structures on the roof. One of them is the air conditioner, and the other box is most likely an evaporative cooler. So what exactly is an evaporative cooler, and why are they only on some homes?
What are Evaporative Coolers?
An evaporative cooler is different from an air conditioner. It uses
