Delta Controls | 21,557 followers on LinkedIn. Developer & Manufacturer of Intelligent #BuildingAutomation solutions for #HVAC, #Lighting, & #Access controls. | Delta Controls is a global leader in Building Automation Systems (BAS), with over 300 distributors, and many thousand of installations in more than 80 countries. Delta Controls is recognized as a market leader in the manufacture of open-protocol BAS. Delta Controls has been instrumental in the development and evolution of the BACnet open-protocol (now the most common protocol in the industry).