The definition of a new commercial ac unit cost can be quite complex and is dependent on a few factors. The main factors that determine the cost of a new commercial ac unit include the size and efficiency of the unit, the installation costs, and any extra features included in the model. The size of the unit should be chosen with care, as a larger unit can cost significantly more than a smaller one. Efficiency ratings are also important, as higher efficiency units will cost more upfront but could save money in the long run. Installation costs can vary widely depending on the complexity of the job and any needed modifications. Finally, extra features such as energy-saving settings or wireless connectivity can add to the cost of the unit. Considering all of these factors, the cost of a new commercial ac unit can range anywhere from a few hundred to a few thousand dollars.