The symphony air cooler has a 45.72 cm fan, In the old days people used the iron coolers which earths the current, injurious to children, Now a days in this technological world people are using this kind of Symphony winter cooler, Gives the coolest air for the people those who cant effort Air conditioners. This is very low in price which spreads air in the whole room . Symphony is one of the companies which is in lead in another products also.The servicing and supportn of symphony is good. Totally symphony air cooler doing there best and we have to encourage it