AC is not required if you own this Symphony’s cooler. As the name suggests, it makes me feel winter in summer.
I am using this model of symphony from two years. No complaints so far. Sound is unnoticeable at times. The best part is that it is easily movable. Even with water: -) . It is enough to cool a single medium size room. I don’t have any idea of its performance in big rooms.
I strongly recommend this cooler for everyone. Go for it.