"The function of residential and commercial air conditioners might be the same that is to cool the inner environment of a building. But there are certain prominent differences between the two units. One of the main reasons behind this is that commercial air conditioners have to cool a larger space while residential air conditioners cool quite a small area. First of all, the commercial air conditioners are generally located on the rooftop of the building while the residential air conditioners are located outside the house either behind or beside it.Secondly, commercial ACs come as packaged units while the residential ones are split systems. In commercial air conditioners all the components like the condenser, the evaporator, the compressor, the blower, the condensate draining, and the condenser fan all are located within a single cabinet and only the ducts and the zone dampers are located inside the house. On the other hand, in case of residential units, there is an outdoor unit and an indoor unit. Last but not the least; the residential units are standalone while the commercial units are modular in structure."