Most of us who are familiar with the idea of air conditioning are aware of the different types of air conditioners, namely the window type, the split type and the portable type. These are also probably the most common air conditioners around that we see so often. But what about this new type of air conditioner called Central air conditioner that everybody seems to be talking about these days? While air conditioners have been around for a long time now, centralized air conditioners seems to be the newest addition to the family of air conditioners. And it is spreading fast, leaving no direction untouched. It first became popular in Asia, after which it spread to the United States of America where it gained wide spread acceptance and popularity.