Which term describes a smoke control approach that uses pressurization to protect corridors from smoke?

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Pressurization creates a positive pressure in the protected corridor, making it a barrier that smoke cannot easily cross. By supplying conditioned air into the corridor and balancing it with exhaust so the corridor remains at a higher pressure than adjacent spaces, smoke is pushed away and is less likely to penetrate the egress path. This keeps the corridor tenable for occupants to evacuate and gives firefighters a safer route to operate from. For the system to work, doors to the corridor should close properly and penetrations around the space should be well sealed, with the supply and exhaust carefully balanced to maintain the pressure difference. This approach is distinct from methods that rely on building zoning or passive design alone, or from techniques that use opposing air flows to contain smoke.