Invensys Energy Management Systems Maine Controls is the exclusive Invensys representative for Maine. Invensys Building Systems is part of a growing family with a long and proud tradition of global leadership in building controls technology. They offer the most extensive line of controls and components available to today's market, including valve bodies, valve assemblies, actuation devices and sensors, as well as interfaces and automated systems that link these products and other building systems together. With hundreds of patents awarded for their product designs, Invensys offers the most innovative line of state-of-the-art HVAC control systems and devices in the industry. Superior engineering, combined with ISO 9001 certification and six-sigma lean manufacturing, ensures that our products conform to the highest standards of internationally recognized quality, providing solid performance, unsurpassed value, and exceptional reliability.