The climate control systems in most commercial buildings have very little similarities to their residential counterparts. While it is true the ultimate goal of both systems is to create a comfortable climate-controlled environment, how this is achieved is done in very different methods. 

While some parceled sections of a commercial building will utilize a package unit or sometimes a roof top unit (RTU) to cool and heat a small space, in general large commercial spaces, such as hospitals or large office buildings cannot be heated and cooled in this manner.