Also known as a swamp cooler, this device uses a fan to recirculate the room’s air across a cool, wet pad (aka a wick) and then expel that freshly dampened air into the room. There are a lot of different ways to take advantage of natural evaporative processes, but one common solution is to build or buy an evaporative cooler. And that’s before we even get into the complicated contributions of chemical refrigerants.Įvaporative cooling (PDF) is a refrigerant-free alternative that uses much less energy. Air conditioning costs money, and it also leads to a sort of self-fulfilling prophecy: All that energy use contributes to global warming, which means we need to use more air conditioning, which uses more energy, which costs more money, and so on forever.
Although using AC does effectively leave you feeling cooler than before, it’s also an energy-intensive process. Traditional air conditioners-window units, central air, even those clunky portable units with the big unsightly hoses-are great tools for removing the heat from a room.
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