The Air Washer is a device used for conditioning air. In a washer air comes in direct contact with a spray of water and there will be an exchange of heat and mass (water vapour) between air and water. It is an air conditioning system that works on the basis of evaporation and with water cover. This is defined both in the field of refrigeration and in the field of heat production. Therefore, Air washer can be used both in cold seasons and hot seasons.