What is the difference between an air cooler and an air conditioner?

Both devices can lower the temperature of the room, although the air conditioner is more efficient for this. They do not have the same operating mode. Indeed, the air cooler uses the principle of evaporative cooling by propelling humidified air. As for the air conditioner, it uses a refrigerant liquid and produces dry air. In addition, an air conditioner is more expensive and energy-intensive than an air cooler. It is also more complex to install (hot air evacuation pipe).