Residential rooftop air conditioning units, also known as roof top packages, are packagings of all the necessary components you need to effectively cool your home. Whether you’re replacing an existing rooftop AC unit or installing one for the first time, a comprehensive rooftop package includes everything you need for the job–including the condenser, evaporator, compressor and even the ductwork and wiring. This combination of quality components ensures optimal energy efficiency, excellent cooling performance, and long-term savings on your energy bills. The rooftop AC unit definition is an easy-to-understand guide to understanding the kind of comfort that comes with a rooftop residential cooling system.