When choosing the proper air conditioning system, Leggett's experts takes into account the size of your home and the amount of air supply/return is available in your home to maximize efficiency for greater savings in the long run.  Most air conditioners may look similar, but check the SEER ratings. Higher SEER numbers save more money. A 13 SEER rated air conditioner uses 23% less energy then a 10 SEER unit. 13 SEER has been the minimum efficiency standard since 2006.