Package units are another type of Commercial Rooftop AC. These units have a condensing and evaporator unit and are commonly used in industrial settings. The biggest benefit of these units is their energy efficiency. These units feature high-efficiency compressors, multi-stage compressors, and single refrigerant circuits. They also provide part-load efficiencies, two-stage cooling, and are compatible with LEED credits. For even more energy savings, you may be eligible for utility rebates and LEED (r) credits.