ANSI/ASHRAE Standard 135

ANSI/ASHRAE Standard 135, also known as BACnet (Building Automation and Control Networks), is a communication protocol that enables different building systems—like heating, cooling, lighting, and security—to securely exchange information. It ensures these systems can work together seamlessly, regardless of the manufacturer, improving building efficiency, comfort, and safety. The standard sets technical guidelines for data messaging, device interoperability, and network security, facilitating integrated building automation that is reliable and manageable.