Portable air coolers are evaporative air cooler with a throw of 8 to 10 feet. In some countries, the coolers have been developed with a throw of up to 30 feet, but such coolers suffer a major disadvantage of being very noisy since they have exhaust fans as air blowers in them as the moving machine for air movement.
Constructional features of personal coolers are similar to the swamp coolers. There is a container holding everything, the air fan, the water pump, the container for water and the controls of the air cooler. In addition, there are castors for taking the cooler from place to place. Everything arctos air cooler here is lightweight for easy portability. The water holding capacity of the cooler is smaller. It might be sufficient for 8 to 15 hours depending on humidity of atmosphere.
Some swamp coolers have control for maintaining the water level in the cooler basin. Since the coolers are by definition “portable”, they cannot be connected to water mains for controlling water level. Water addition is by manual method only. Some of the coolers are combined with dehumidifiers and sold as personal coolers. In fact, they are air conditioners. The air conditioners are costlier than personal air coolers.