Evaporative air conditioners are effective, durable cooling devices. The air conditioner works by using the vaporization process, i.e. water evaporation. The air goes to the vaporizer through cellulose inserts mounted on three walls of the device. It is then cooled down by 6-12°C and blown out by a solid fan. The air provided by the air conditioner is properly humidified, oxygenated and, importantly, fresh. Depending on the parameters, air conditioners are able to cool an area of up to 350 m2. It is used from small buildings, such as shops, kiosks, small offices to large industrial buildings, production halls or large-scale warehouses.