How do swamp/evaporative coolers work?
Swamp coolers are efficient and effective cooling appliances. As a direct replacement for air conditioning in dry climates, these coolers are an example of how we can work with nature. Being considerably less expensive than air conditioning, it almost seems that one is getting something for nothing when using a swamp cooler. The way a swamp cooler operates is very simple. There is a low horsepower motor which pumps the water from the floor of the cooler to the top of the cooler, where it proceeds to fall down the sides and along porous filter pads. A second motor drives a fan which pulls air from the outside, through the cooler, and then pushes this out into the hot room. The significant cooling action results from the water evaporating as the air passes through it. Incidentally, the water level is kept constant with the help of a floating sphere, functioning similarly to the one in a toilet bowl. The hot air enters the cooler, where two small motors power nothing more than a fan and a
