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- United Maintenance, Inc
United Maintenance, Inc
United Maintenance, Inc. has been serving metro Atlanta since 1974, specializing in heating, air-conditioning, building automation and ventilation for commercial, industrial and institutional clients. Our technicians are among the highest trained experts in the HVAC industry. They receive certified training in the classroom, as well as on site experience in design, engineering, installation and service of the latest in HVAC equipment and controls.