Why This Compliance Test Matters
Failing a stairwell pressurisation test can stop a building from receiving its occupancy certificate-instantly. In Queensland, compliance with stairwell pressurisation standards isn’t optional; it’s a life-safety and legal requirement under the National Construction Code (NCC) and AS 1668.1. For commercial builders, this test can mean the difference between on-time project handover and costly delays.
Air Care Air Conditioning ensures every system we design, install, and commission not only meets but exceeds these standards, keeping your projects on track, fully certified, and legally compliant from day one.
Why Stairwell Pressurisation Is a Legal Requirement
The Life-Safety Purpose Behind the Standard
Stairwell pressurisation systems are designed to save lives. In a fire, they maintain positive air pressure in fire-isolated stairwells to prevent smoke infiltration, giving occupants a safe, breathable escape route. Under AS 1668.1 – Fire and Smoke Control in Buildings and NCC Section E2.2, compliance is mandatory for all multi-storey commercial and residential developments.
The system must achieve specific pressure differentials-typically between 50 and 60 Pascals-to keep smoke out while ensuring doors remain easy to open. In addition, under the National Construction Code (NCC), stairwell pressurisation and related smoke control systems must be designed and installed in accordance with AS/NZS 1668.1, and automatic smoke detection and alarm systems must be provided to operate this equipment as part of zone smoke control for fire-isolated exits.
Failing to meet this delicate balance is not just a design flaw; it’s a breach of safety, compliance, and building certification requirements that can immediately halt project completion.
Who Is Legally Responsible for Compliance
Responsibility for stairwell pressurisation compliance ultimately falls on the principal contractor and the building certifier, but the practical burden rests on the mechanical contractor. HVAC designers, engineers, and builders must collaborate from the earliest design phase through to final testing and certification.
Air Care’s role is to make that process seamless. Our team manages everything – from system design and airflow modelling to commissioning and certification documentation – ensuring each project passes its compliance inspection the first time.
The Key Standards You Must Meet in Queensland
AS 1668.1 and NCC Section E2.2 Explained
Queensland’s enforcement of stairwell pressurisation standards aligns directly with the National Construction Code and AS 1668.1. These regulations define the required airflows, fan performance, pressure stability, and fire-isolation behaviour of stairwell pressurisation systems.
The system must maintain positive pressure within a specified range both when all stair doors are closed and when one or more are open. Achieving this requires correctly sized supply fans, variable speed drives, and automated controls that adapt dynamically to pressure changes. Any deviation from this standard risks non-compliance, making precision engineering essential from the start.
What “Passing the Test” Really Means
A compliant stairwell pressurisation test measures far more than airflow – it verifies the safety and reliability of the entire system. Key performance benchmarks include:
- Pressure differential: Typically between 50 and 60 Pascals.
- Door opening force: Must not exceed 110 Newtons to allow safe evacuation.
- Fan redundancy and control: Systems must engage automatically under fire mode and maintain stable operation.
Common causes of test failure include incorrect fan sizing, poor sealing of stairwell doors, and inadequate control sequences. Each failure can delay certification and trigger expensive rectification work. Air Care eliminates these risks through staged commissioning, calibration, and pre-certification testing under real operating conditions.
How Air Care Designs Systems That Pass Every Time
Engineered for Compliance from the Start
At Air Care Air Conditioning, every stairwell pressurisation system is purpose-designed for Queensland’s construction environment. Our engineers use advanced airflow modelling software and deep technical knowledge to ensure compliant pressure stability across all building conditions.
From high-rise developments to commercial complexes, our systems are engineered in full accordance with NCC and AS 1668.1. Each project is supplied with complete commissioning documentation, ensuring certifiers have a clear compliance trail from design to delivery.
Integration with Fire Safety and Ventilation Systems
Our stairwell pressurisation systems are never isolated installations. We integrate them seamlessly with broader mechanical and fire safety infrastructure – including car park ventilation, smoke extraction, and building management systems – to ensure cohesive operation across all emergency scenarios.
These automated systems communicate directly with the building’s fire indicator panel, activating immediately in response to fire mode triggers. During standby periods, they operate in low-energy mode to reduce running costs while remaining compliance-ready at all times.
Real-World Risks of Getting It Wrong
The Cost of a Failed Pressurisation Test
For builders, a failed stairwell pressurisation test can have serious consequences. Without a passing result, the certifier cannot issue an occupancy certificate. That means halted handovers, mounting project costs, and potential liquidated damages.
In multi-storey developments, re-engineering a non-compliant system can cost tens of thousands of dollars and delay completion by weeks. Worse still, an unresolved compliance breach can affect future insurance eligibility and reputation within the construction industry.
How Air Care Prevents Compliance Failures
Air Care’s quality assurance framework is designed to prevent these outcomes entirely. Every system undergoes multi-stage pressure testing, fan performance calibration, and failure simulations before final sign-off.
Our technicians are fully ARCtick certified (AU00123) and operate under Australian Standards for safety and refrigerant handling. Each project includes digital test documentation – from design verification to commissioning – ensuring full transparency and audit-ready compliance.
Ongoing Maintenance and Annual Testing Obligations
The Forgotten Part of Compliance
Compliance doesn’t end when the project is signed off. Under AS 1851, building owners must perform ongoing maintenance and annual testing of stairwell pressurisation systems. Failure to maintain records or keep systems functional can invalidate occupancy certification and insurance coverage.
Air Care’s commercial maintenance contracts are structured to keep systems compliant year-round. Each plan includes scheduled inspections, airflow recalibration, and certification reporting – tailored to suit each building’s occupancy and fire safety requirements.
Protect Your Certification Year-Round
Our maintenance programs ensure long-term operational integrity and compliance. From quarterly audits to 24-hour emergency response, Air Care’s dedicated support coordinators guarantee your stairwell pressurisation systems remain functional, safe, and compliant across the entire building lifecycle.
Why Commercial Builders Trust Air Care
Proven Partner for Compliance-Driven Projects
For more than 25 years, Air Care Air Conditioning has partnered with Queensland’s leading builders, developers, and architects to deliver reliable, compliant HVAC and mechanical ventilation systems.
Our experience spans high-rise offices, retail complexes, healthcare facilities, and large-scale residential towers – each passing compliance testing on the first inspection. Builders trust Air Care because we understand the technical, regulatory, and logistical demands of large commercial projects – and we deliver on every one of them.
End-to-End Accountability
Unlike fragmented subcontractors, Air Care offers complete accountability. We handle the design, installation, testing, certification, and maintenance in-house, providing a single point of responsibility for every compliance requirement.
Builders choose us because we remove uncertainty. Every system we install is engineered to pass, documented to standard, and supported for the long term.
Don’t risk a compliance failure. Partner with Air Care Air Conditioning for certified stairwell pressurisation systems in Southeast Queensland. Contact us or call 07 5508 1700 today.