An air conditioner cools the air inside your house by removing humidity and excess heat from the air. It transfers the hot air outside and brings the cool air back inside the house. Air conditioners are used in many situations where there is no additional cooling such as inside a factory or a warehouse. They are also used to replace evaporative cooling systems that have no direct circulation or are too expensive for a small business.
Most air conditioners come in a variety of shapes and sizes, some big and some small. The air conditioner I personally use is called an evaporative cooler, it is a combination of an evaporative and non evasive cooling system. It works on the principle of forcing cool air into a warm place and sucking warm air out of a warm place, which is the simple and effective way to cool or heat your air inside of your house. This is a very effective solution and will drastically cut down on your heating and cooling costs each and every month. There are many other types of air conditioners that are designed to do similar things, but they are much more complicated and cost more money.
The air conditioner that I currently use cuts my energy bills by about 30%. The cooler unit is very efficient and allows me to cool or heat only the rooms that I need to, reducing my overall energy usage. It is my understanding that these types of air conditioning units are not very easy to find in the retail store because they are more complex and require more maintenance. However, if you know what model you need and shop around, you should be able to find them fairly cheap.