On low setting, it draws just 0.8 amps (11.3 watts), which by air conditioner standards is nothing. It’s about the same as a small twelve-volt desk fan. It only uses just over a liter of water an hour, so it’s great in situations where water supply is limited.
One gallon (3.75 liters) of water will last around two to three hours in the daytime and four to five hours during the night when used for evaporative cooling in our dry desert climates. This model doesn’t need ice.” – Steve N., 2000 Silverado 2500, 2008 Stracraft Pine Mountain