Sam Preston January 17, 2025 Climate Plus, Heating and Cooling How Much Water Do Swamp Coolers Use: A Practical Guide to Consumption Rates Swamp coolers, also known as evaporative coolers, are a popular cooling option in hot, dry climates. They work by using water to cool air through evaporation. But how much water do these devices use? On average, swamp coolers use 3-to-15…