differences between central AC and normal AC

For your home, you can have a window unit or you can have Central Air. A window unit cools a relatively small area, such as one room. You may need several window units to cool your whole house.

With central air, you will have one main unit, usually situated in your attic or outside your home. It produces cool air which is then blown through large 'tubes' called ducts into vents situated throughout your home.