G&R Controls provides energy management solutions, including automatic temperature controls, fire alarm and security systems, and hydronic heating and cooling equipment. It is a subsidiary of O'Connor Group, a company specializing in supply of indoor comfort needs, such as heating, cooling and air conditioning. The company provides a variety of commercial products from Siemens and McQuay. Its other two subsidiaries include O'Connor Company and Balancing Professional Inc. Balancing Professional Inc. is independently owned and operated for third party services providing NEBB- certified testing and balancing expertise. O'Connor Company specializes in commercial heating, ventilation and air conditioning (HVAC) equipment.