NFPA Standard Explorer

Requirements for the design, testing, and operation of smoke control systems in buildings—including pressurization, exhaust, and compartmentation approaches. Commonly encountered in high-rises, atriums, underground structures, and large assembly occupancies.

Smoke is the primary cause of fire-related fatalities. In large or complex buildings, smoke control systems actively manage movement of smoke to protect egress paths and support survivable environments. First-due companies that understand smoke control system modes—and what happens when they fail—make better decisions about search, rescue, and ventilation operations.

• Smoke control system design approaches: pressurization, exhaust, and zoning (conceptual)
• Atrium and large-space smoke management concepts (high level)
• High-rise stairwell pressurization concepts
• Underground and complex occupancy smoke control concepts
• System testing, acceptance, and maintenance requirements (high level)
• Fire command center interface and override concepts

• Identifying smoke control mode activation and fire command panel location during high-rise preplanning
• Understanding stairwell pressurization intent when making entry decisions in high-rise operations
• Briefing company officers on what atrium smoke exhaust systems are designed to do (and what they don't protect against)
• Coordinating with building engineers during extended high-rise or underground incidents
• Supporting inspectors during smoke control system acceptance and annual testing

• Open stairwell doors help smoke move out (in a pressurized stairwell system, opened doors allow smoke in—coordinate with building systems before forcing doors).
• Smoke control systems are self-managing during fires (they require proper installation, testing, and sometimes manual override to function as designed).
• Automatic activation means the right mode activates (incorrect sensor placement or system failure can activate the wrong zone or mode).

• Identify fire command center location and smoke control panel capabilities during high-rise preplanning
• Brief crews on stairwell pressurization: keep doors closed except for egress—coordinate with IC before propping
• Include smoke control system interface questions in your target hazard preplan format
• Train company officers to request building engineering support early in complex building fires