Parts Sales OConnor Company is a manufacturers representative, supplying heating, ventilating and air conditioning equipment to contractors and commercial customers. We also supply after-market parts and supplies and pride ourselves on being a technical resource in
HVAC Service Technician G&R Controls is an Independent Field Office for Siemens Industry, Inc. Since 1977, we have sold, installed and serviced building automation and temperature control systems. We also offer mechanical service and factory certified
Compliance Administrator HVAC Elements provides HVAC equipment, controls installation and service, and balancing solutions for commercial and institutional facilities. We have been in business since 1971 and have offices in Sioux Falls and Rapid City South