O general is one of the best air conditioner compare to other air conditioner. The service given by this air conditioner is excellent and best compare to other. The supply for this air conditioner is mainly three phase system in the house. fast cooling is done by this air conditioner and the sound is normal . Most of the big companies and big industries buy this air conditioner because there is a large space so they required this type of air conditioner. compare to other air conditioner the value of money is little bit higher and this air conditioner gave good satisfaction .