A swamp cooler, also known as an evaporative cooler, is a device that cools air through the evaporation of water. It works by drawing warm air through water-saturated pads, which cools the air before it is circulated into a room. This method is energy-efficient and environmentally friendly, making it a popular choice in dry, arid climates. Swamp coolers are typically less expensive to operate than traditional air conditioning systems. They require regular maintenance, such as cleaning the pads and ensuring proper water levels, to function effectively. While they can lower temperatures significantly, their effectiveness decreases in high humidity conditions.