If you need to have a residential air conditioning installation in your home, for whatever reason, there are several things that you are going to need to consider to make sure that you are getting the right air conditioner for you and your house.
When you are looking at all the various units out there, you want to make sure that you are getting one that is the right size for your house. If you get one that's too big, it will be running through cooling cycles way more often than it needs to, which will use up more energy and can potentially run down the life of your air conditioner. And if you get one that's too small, you are running the risk of your house not getting as cold as it should. There are load calculations which will need to be done in order to make sure that you are getting a unit of the right size. Those calculations will take the square footage of your house, how well your house is insulated, and a few other things into account. If you aren't sure about the square footage of your house, then you can measure it. You will need a measuring tool, a helper, and a calculator. You will need to measure the length and the width of each room and then multiply them together. If your room is an odd shape, break it into squares or rectangles and measure each area separately. After you have done this for all your rooms, add the total up and voila, you should have a rough square footage of your house.
Air conditioners are rated by SEER values. SEER stands for seasonal energy efficiency ratio. Basically, this measures how efficient your air conditioner is. There are federal regulations that say that an AC unit has to have a SEER of at least 13, but anything over 14 is going to be rated as energy efficient. So, when you are looking for your new AC, make sure that you check the SEER value and see about how much it will cost you to run, based on its size and what temperature you are going to want to keep your house at.
If you are looking for a new air conditioner, there are a lot of things that you need to look at to make sure that you are getting the right unit.