American Mechanical Systems

American Mechanical Services (AMS) is one of the nation’s leading providers of commercial heating, ventilation, and air conditioning (HVAC) maintenance, repair, replacement, and new equipment installation, as well as plumbing and related services.

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. This allowed AMS to quickly assimilate into each market. Accordingly, it was during this period that the AMS entities were acquired and reorganized into our current entity locations, which include:

In 1999, AMS was acquired by ServiceMaster. Each AMS company became a wholly-owned subsidiary under the ServiceMaster / AMS operating division rubric. During this period, Ed Dunn and Dave Schellhardt served as key officers of the ServiceMaster / AMS operating division and played significant roles in shaping the AMS brand as an industry leader.

In 2006, Dunn and Schellhardt formed a single-purpose parent company to acquire AMS from ServiceMaster. Thankfully, AMS has enjoyed its most successful years under the watch of Dunn and Schellhardt.

Collectively, AMS has an average of 30-plus years of industry experience. This kind of success and longevity can only be attributed to the quality and value of the work we provide to our customers.


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