When reliable and efficient cooling or heating is needed for large commercial spaces, a Commercial Rooftop Unit is usually the right answer. These self-contained systems are meant to be installed right on the roof, freeing up valuable room inside for additional uses and minimizing the need for complicated ductwork or taking up floor space within the building. The installation of a commercial RTU is a complicated affair that demands the expertise of qualified professionals, ample planning, and adherence to local building codes.