Buying an air conditioner is viewed as a long-term investment by most people. Once you procure an AC, you expect to use it for at least a few years. The number of years an AC will provide you with good service depends on different factors including the brand it has been manufactured by and how well you look after it. However, before you go about engaging in maintenance processes and doing other things to increase the lifespan of your AC, you have to first get the installation part right.