The electric fan is used to lower the temperature of the water tank and is controlled by a thermostat. When the water temperature rises to the upper limit, the thermostat will turn on the power and the fan will start working. When the water temperature drops to the lower limit, the thermostat will turn off the power and the fan will stop running. Most Spal fans have a waterproof motor designed to run for many years. See a lot of fans who look like Spal fans? See comparisons with Spal fans? Everyone else tried to copy Spal. They try to copy Spal because they know that Spal is the best cooling fan. Spal fans are made in Italy and are very reliable. Our Spal fan has a service life of 12,000 to 15,000 hours, and the cabin brushes are imported from AVO France. We can provide 1.5 to 2 years warranty.