With the Internet and videos on how to do just about everything, doing it yourself has become a byword. However, there are things that you should always have a professional do — installing an AC unit is one of those things.
Regardless of size, all AC units are heavy. It’s not worth risking your back or dropping a unit to save a few dollars. In the long run, it might cost you more to do it yourself. After all, your time is important, and do-it-yourself projects generally take longer than having professional installation. If you get a unit that is too small to cool your space, you will end up working the unit harder, spending more energy and decreasing the lifespan of the unit. More importantly, you won’t be comfortable because the AC won’t be doing what you want it to do.