AMS is one of the nation’s leading providers of commercial heating, ventilation, and air conditioning (HVAC) maintenance, rep ... air, replacement, and new equipment installation. AMS began in 1997, when American Residential Services (ARS) purchased approximately 25 independent contractors and consolidated them to create a commercial HVAC arm. The newly acquired contractors were already well established companies with years of experience in the HVAC industry. Our current entity locations include: - Air Conditioning Associates, Inc. d.b.a. ACA – Denver Boiler - American Mechanical Services of Colorado Springs, L.L.C. - American Mechanical Services of Denver, L.L.C. - American Mechanical Services of Houston, L.L.C. - American Mechanical Services of Maryland, L.L.C. - American Mechanical Services of Texas, L.L.C. - AMS Mechanical Services, L.L.C. d.b.a. AMS Mechanical Services of Indianapolis, L.L.C. - Anderson Air Conditioning, L.P. - Southcoast Heating & Air Conditioning, L.P. - Tri-Pacific Heating & Air Conditioning, L.P. - AMS of Virginia (operating via AMS of Maryland) In 1999, AMS was acquired by ServiceMaster. During this period, Ed Dunn and Dave Schellhardt served as key officers of the AMS operating division and shaped the AMS brand as an industry leader. In 2006, Dunn and Schellhardt formed a single-purpose parent company to acquire AMS. Collectively, AMS has an average of 30-plus years of industry experience. read more