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Emergency stairwell pressurisation.

Continuous differential pressure control, without over-pressure, within the NBR 14880 range.

Talk about this project →See how it works ↓

MeasuresΔP stairwell × floorbuilt-in sensor in the STG CPD, two pressure taps

CommandsThe pressurisation fanproportional or on/off, through the compatible drive

KeepsPressure at the setpointdoor opens, pressure drops, the controller restores it

SupervisesDisplay, web and RS-485setpoint, history and over- and under-pressure alarms

How it works

Door opens, pressure drops, the controller responds.

A pressurised stairwell must keep the differential pressure within the standard's range all the time, without jamming doors through over-pressure. That takes continuous control, not on/off.

Setpoint and history on screen
Real-time ΔP reading
Proportional or on/off control
Web interface
RS485 for BMS

Pressure loop

Pressure returns to range at every door

Keeps the stairwell pressurised within the pressure range required by the standards. When a door opens, pressure drops and the controller acts to restore it.

+−

Pressure tapsstairwell (−) and reference floor (+)

measures pressure

**STG CPD**next to the stairwell · built-in ΔP sensor · setpoint on screen

commands the drive

**Pressurisation fan**supplies air at the base of the stairwell

Drive

Drive defined in the project: STG DRV for a single-phase AC or EC fan, variable frequency drive for three-phase. The CPD is the controller.

Door opens and closes: pressure returns to the required range
Escape route free of smoke
Pressure logged on the display and the web interface for real-time monitoring

Cross-section of an emergency stairwell with the pressurisation fan at the base and sensors on the landings

The system in place

Air at the base, pressure along the whole stairwell.

Fan at the baseSupplies outdoor air into the stair shaft. The stairwell stays at positive pressure relative to the floors.
CPD next to the stairwellReads the differential pressure between stairwell and floor with the built-in sensor and modulates the fan to keep the standard’s range.
Door opens, pressure returnsWhen a door opens, pressure drops; the controller speeds up the fan and restores the range, with no over-pressure when it closes.

Supervision

Setpoint, history and alarms, at the stairwell and in the BMS

The CPD shows the measured pressure, the setpoint and the history on its display, and alarms over- and under-pressure. Through the web interface, the same panel on any computer or phone; over Modbus RS-485, the data goes to the building's BMS.

Modbus RS-485

BMSof the building

BMSintegrated readings

Storge web interface on a computer — **Web interface**computer and phone

Storge web interface on a phone — **Web interface**computer and phone

01 · MeasurementΔP between stairwell and floorThe STG CPD measures the differential pressure between stairwell and floor with its built-in sensor, through the two pressure taps.
02 · ControlFan modulated at the setpointThe controller modulates the pressurisation fan through the compatible drive to hold the setpoint: a door opens, pressure drops and the fan speeds up; the door closes, it returns to normal, with no over-pressure.
03 · SupervisionAlarms, history and BMSSetpoint, history and over- and under-pressure alarms are on the display and the web interface; over Modbus RS-485 they reach the BMS.

What the system delivers

Pressurised stairwell, free door.

Continuous pressure within the standardThe built-in sensor reads ΔP in real time and the controller modulates the fan. No over-pressure that jams doors, no mechanical relief damper.
Over- and under-pressure alarmsIf pressure leaves the range, the CPD alarms on the display, on the web interface and in the BMS. The history is logged as evidence.
One controller per stairwellThe CPD sits next to the stairwell, with the two pressure taps. Drive and pressurisation panel sized for the project's fan.

Features

What comes with the system.

Dedicated differential pressure control
Modulation by frequency drive or electronic fans
Real-time over- and under-pressure alarms
Native web interface for configuration and remote supervision
Modbus RTU communication for BMS integration
Compatible with fire detection and alarm systems
Compliance with NBR 14880 and the fire brigade technical instructions

Commercial buildings
Residential buildings
Hospitals
Hotels

Components

Who does what.

Catalogue →

STG CPD

Differential pressure controller with built-in sensor, display and web interface.

RequiredSee product →

STG DRV

Single-phase AC or EC fan drive. Three-phase: frequency drive, defined in the project.

Depends on the projectSee product →

Supply

What Storge delivers and what it needs to know.

Delivery: STG CPD controller. Made-to-measure pressurisation panel when contracted. Drive and fan as per the scope.
To quote: Number of floors and doors · planned fan · fire brigade and project requirements.
Limit: The pressurisation panel is not the complete panel for AHUs. The fan is an external item, included in the scope when contracted.
Standards: NBR 14880 and the fire brigade technical instruction applicable in the state.

Talk to engineering →Request documentation

Frequently asked questions

Before quoting, what people ask.

Quote

Tell us the stairwell. Storge sizes the system.

You send the basic stairwell data through the form or on WhatsApp. Engineering checks the configuration and returns the proposal.

01 · Reply on WhatsAppDuring business hours, Monday to Friday, 8 am to 6 pm (BRT).
02 · Stairwell dataFloors and doors, planned fan and fire brigade requirements.
03 · Sized proposalController, drive and panel, with scope and investment.

Prefer to send the stairwell data in writing?

Stairwell pressurisation in your project?

Controller, drive and pressurisation panel sized for your stairwell, with a proposal of defined scope.

WhatsApp →41 3056 3431