Since 1977, G & R Controls has been providing design, installation, and service for temperature control, building automation, ... energy management and security systems. With locations in Sioux Falls and Rapid City, South Dakota and Fargo and Bismarck, North Dakota, we work with mechanical contractors, engineers and building owners to provide solutions for commercial and institutional markets. We are a Siemens Apogee Authorized Dealer and Independent Field Office. read more