Air Conditioning Contractors & Systems is an industry that specializes in the installation, repair, and maintenance of air conditioning systems in residential, commercial, and industrial buildings. This industry involves a range of activities, including designing and installing new systems, retrofitting existing systems, and providing ongoing maintenance and repair services. Air conditioning contractors work with a variety of systems, including central air conditioning, ductless mini-split systems, and window units. They also work with a range of clients, from homeowners to large corporations.