Established in 1970, Rasmussen Mechanical Services was previously known as Rasmussen Heating and Air Conditioning. Located in Sioux City, Iowa, it is a single source provider of service, repair, installation and design. The company offers a range of services, such as National Board welding and repairs, design-build, installation and full-service parts distribution. Rasmussen Mechanical Services operates Heating, Ventilating and Air Conditioning Services; Mechanical Construction; Industrial Burner Services; Code Services and Boiler Repair; Temperature Controls; Air and Water Balancing; Lab Safety Certification and Repair; and Parts and Equipment Sales divisions. It caters to the needs of commercial, industrial, and institutional clients throughout the Central United States. The company is a member of the Mechanical Service Contractors of America, Excellence Alliance and National Sanitary Foundation, among others.