The units have many functional sections: air supply, cooling, heating, humidify, dehumidify, air purify and silencing. The units are widely used in the air system of many industries like mechanical, electronic, textile, medical, metallurgy, chemical, energy and food, etc.  The units are also ideal for restaurants, office buildings, hospitals, theaters, supermarkets and palaestra .They can be used independently and can also match the fan coils to add refresh air. The model selection software is used for economic and optimized choice.