UL 864 Listed Stairwell and Elevator Pressurization Controls

Tags: Elevator Pressurization, LFSystems, Life Safety, RM Manifold, Stairwell Pressurization

Replace Field-Built Components with a Complete UL 864 Listed Package for Stairwell and Elevator Pressurization

This presentation provides a technical overview of the design of elevator hoistway and stairwell pressurization systems, with an emphasis on code compliance, smoke control requirements, and real-world design considerations. The session reviews applicable codes, performance criteria, and system behaviors required to maintain safe egress conditions during a fire event, while addressing common design and installation challenges that can impact smoke control performance and project compliance. The presentation also examines how LF Systems’ UL 864-listed Active Compensated Stairwell Pressurization (ACSP) solution simplifies implementation through a complete, single-source control package while supporting compliant stairwell pressurization system design.

Technical Agenda:

• Goals of stairwell pressurization: egress conditions, airflow control, and pressure integrity
• Codes and standards governing design and performance: NFPA, UL864 and ASHRAE
• Required pressure ranges, door opening forces, and leakage considerations
• Control sequences, fan configurations, and sensor placement
• System behavior under fire conditions
• Design and installation pitfalls in smoke control systems

Active Compensated Stairwell Pressurization (ACSP): a UL 864 listed single-source package