Heating & Cooling SPECIALIST O'Connor Group with O’Connor Company, G & R Controls and Balancing Professionals has offices in Sioux Falls, Rapid City, Fargo and Bismarck. Our divisions work together with mechanical contractors, engineers and building owners of the commercial and institutional markets to make the complexity of indoor comfort systems as seamless as possible. Each company has its strengths. Whether working with HVAC equipment, building automation, temperature controls or testing and balancing systems, we are committed to "Creating Customers For Life" by providing you with the best value from your heating, ventilation and air conditioning systems.
O'Connor CompanyFounded in 1970, we continue to operate under two basic principles, comfort and service. We specialize in commercial heating, ventilation, and air conditioning (HVAC) equipment and offer fully stocked warehouses with knowledgeable staff to help you.
G & R Controls
Providing Automatic Temperature Controls, Energy Management Solutions, Security Systems, Hydronic Heating and Cooling Equipment, Replacement Parts and Pumps and 24/7 “Live” on-call Service since 1977
Balancing Professionals
To expand services building owners and engineers seek, Balancing Professionals was established in 1993. As an independently owned and operated third-party service, we provide reliable NEBB-Certified testing and balancing for any HVAC system.
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