The sizing of your Central Air Conditioner is almost an exact science, so the chart below is only to give you an idea of what your home might require and what you might expect to spend. Remember that if you do this right, your will not only spend less money every month, but you will only have to do it once. Be sure that you go with a licensed HVAC contractor, such as Affordable Air & Heat, and that there are no hidden extras, like electrical work or permit fees. Remember too, that if you size your AC too large, it will cool your house too quickly and not remove the humidity, and you will be uncomfortable, forcing you to operate it at a lower temperature and costing your more money. If you size it too small, it will remove some of the humidity and never cool down to a comfortable temperature, so it will run and run and never cool down to a comfortable temperature.