Windows air conditioners are very popular in Nigeria. When compare with the split air conditioner, the window air conditioner is relatively cheaper in price.
The window air conditioner is often installed in house walls. This requires breaking through the wall if the air conditioner space is not per-planned when the house was being built.
The windows air conditioner filter may require frequent changing in dusty environment, which is common here in Nigeria, for optimal performance.
Tonnage is used to measure the cooling capacity or power of an air conditioner in relation to the size and requirement of the room. The cooling capacity of an AC is measured on its ability to extract a certain amount of heat from a room per hour.
Although the higher the tonnage the better the cooling it is not the case that yhe bigger the better for your room. So you should buy the right tonnage for the size and requirement of the room you will be installing the window AC. If your AC has tonnage that is to high for the size of your room, it will cool too quickly and turn off too quickly without going through the proper cycle.
Also, it will be important for you to remember that, apart from size, the location of your room will also play a role in deciding the perfect tonnage. If your room is always getting direct sunlight or located near your kitchen which increases the heat that is constantly in the room which may requires a, A/C with higher tonnage.