Many of our older coastal homes were built without air conditioning. To update that for the preference of today's buyers we are seeing more wall mounted units (often called a "mini-split") being installed versus central air conditioning being added. That is often for cost saving reasons both in the purchase and installation as well as the use - you only have to cool the rooms you are using instead of the entire house. The down side is these units can be ugly and look cheap. LG has come up with an interesting solution. They are making a series of air wall mounted air conditioners that are hidden behind framed art you can customize. The designs still need some work but they are a step in the right direction. Click here for more information on the LG product line.