Ac or we can say air conditions were known as the symbol of luxury and lavishness in past some decades, it has now become the most basic need and necessity of houses and establishments, specifically in those countries where hot weather is the most severe and stay for too long, such as USA, Australia, Canada and many Asian countries. The use of ac has been increased with the raise in global warming; we can very easily credit that for the extravagant necessity. If we define ACs in technical language we can say that it is a machine that people use in their establishment to cool the temperature of that. It use increase very dramatically in the hot weather but many isolated places use it for thing which do not cooling atmosphere. It pulls out the heat from the areas with the help of a refrigeration cycle to make sure that the temperature remains cold and fresh.
These machines are available in different brands, with different features, sizes, colors, in different tons and shapes but the main purpose of these entire different machines is same and that is to form a cooling temperature. In the past the ACs were known as window ACs. 
They would need to fit in a wall and were the size of a window. Those ACs were known to use the most electric energy. But after some time technology changed and the split air condition get invented. It is now being used very commonly in the entire world. The main reason for people to come toward this machine was the claim that makers gave and it was the less use of electricity by this machine. The other reason for this was there was no need to break walls to install this machine. There were two devices one is inner and the other is outer. We only need to make a hole on the wall to make a way for the wire of the outer which gets installed on the outer wall of the room and on the same wall where the compressor need to be installed. The pipes that we pass through the hole attached both devices compressor and outer with each other. This ACs makes noise very less than the old ACs.
There are some facts about these cooling devices that a person should be aware of while installing them. The cooling capacity of this depends on the tonnage of the ACs. They are available in different numbers starting from 0.50 ton to 2 tons. The lower tonnage will use more electric power and will need more and trouble you very much.
The requirement of ton also depends on the size of the room, the more big the room, the more tonnage it will want. It will also need some other components. You will have to purchase them from market for proper tubing. Â Installation cost is another amount you will have to pay.