Comprehensive stairwell pressurization system inspection for high-rise buildings per ABNT NBR 14880. Smoke control compliance, pressure differential testing, fan performance verification. CREA-licensed mechanical engineer with ART-backed inspection reports.
Stairwell pressurization keeps escape routes smoke-free during a fire. Regular inspection ensures the system will perform when lives depend on it.
Without pressurization, stairwells become smoke chimneys — funneling toxic gases directly into the escape route. A non-functional system transforms the only safe exit into a lethal trap.
We cover all components of stairwell pressurization and smoke control systems per ABNT NBR 14880 and state fire codes.
Centrifugal and axial pressurization fans. Motor condition, vibration analysis, flow rate verification, belt/coupling inspection, and rated performance testing.
Supply ductwork integrity, joint sealing, leakage testing, air distribution uniformity across all floors, grille and diffuser performance verification.
Measurement of pressure differential across stairwell doors at all floors. Verification of 25–50 Pa range per NBR 14880 with all doors closed and with doors open on the fire floor.
Opening force measurement at stairwell doors (max 110 N per NBR 14880). Verification that pressurization does not impede evacuation through excessive door resistance.
Control panel functionality, pressure sensors, fire alarm integration, automatic activation sequence, manual override, and status indicator verification.
Smoke and fire dampers throughout the system. Automatic operation via fusible links or motorized actuators, position indicators, and fail-safe functionality.
Emergency power switchover testing, stairwell door self-closing mechanisms, weatherproofing of air intake/exhaust, system response time measurement, and coordination with fire alarm and building management systems.
| Brazilian Standard | Purpose | International Equivalent |
|---|---|---|
| ABNT NBR 14880 | Smoke control systems — stairwell pressurization | EN 12101-6 · NFPA 92 |
| ABNT NBR 9077 | Fire escape routes and emergency exits | IBC Chapter 10 — Fire Egress |
| IT (Instruções Técnicas) | State-level fire code requirements | NFPA Codes / IBC |
Stairwell pressurization is a smoke control system that maintains positive air pressure inside the escape stairwell relative to adjacent floors. During a fire, pressurization fans inject fresh air into the stairwell, creating a pressure differential (typically 25–50 Pa) that prevents smoke from entering the escape route. This keeps the stairwell smoke-free, providing occupants with a safe evacuation path. The system is mandated by ABNT NBR 14880 for high-rise buildings and certain occupancy types in Brazil.
Yes, for most buildings. Brazilian fire codes — including ABNT NBR 14880 and state-level Instruções Técnicas (ITs) issued by the Fire Department (Corpo de Bombeiros) — require stairwell pressurization for buildings above a certain height (typically above 12 meters or 4+ floors), as well as for underground parking garages and specific high-occupancy buildings. The system must be tested and certified before the AVCB/CLCB fire permit is issued or renewed.
A comprehensive pressurization inspection covers: pressurization fan performance (flow rate, static pressure), ductwork integrity and air distribution, pressure differential testing across stairwell doors (25–50 Pa per NBR 14880), door opening force measurement (max 110 N), airflow velocity at open doors, smoke damper operation, control panel and sensor functionality, backup power activation (generator/battery), and system response time. All measurements are taken with calibrated instruments and documented in the ART-backed report.
The primary standard is ABNT NBR 14880 — Smoke control systems in buildings, which establishes requirements for pressurization systems, pressure differentials, and testing procedures. ABNT NBR 9077 covers fire escape routes including pressurized stairwells. Each state's Fire Department also issues Instruções Técnicas (ITs) with specific requirements. Internationally, the system is equivalent to EN 12101-6 (European smoke control) and NFPA 92 (smoke control in buildings).
Yes. We deliver bilingual documentation — the official inspection report and ART in Portuguese (as required by Brazilian authorities) plus an English translation for your corporate records. All communication during the inspection process is conducted in English.