Cost-Effective Code Compliance for Your Buildings. Many buildings are required by code to have smoke control systems, making it a critical component of your facility management strategy. Metasys® Building Automation System* is available to update or install a UL 864 Listed smoke control system and includes the United States listing UL 864 10th Edition UUKL, as well as the equivalent Canadian listing ORD-C100-13 UUKLC.