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 Company

Founded 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.
 
“BPI performed all of the air balancing at our facility. Service calls are unique in that it takes only one phone call for all HVAC, temperature control and air balancing requirements. Their technicians who worked on our facility were highly trained in all areas of operations. The hospital industry has very little tolerance for down time and these professionals are there when we need them.”
Chuck Mertes
Facility Manager
Black Hills Surgery Center, L.L.P.
Rapid City, SD