AS2047 Testing Process Explained: How Windows Are Certified for Australia

Before an aluminum window or a panoramic sliding door can legally be installed on an Australian construction site, it must prove it can survive Australia’s harsh elements. This proof is established via rigorous laboratory testing.

For fabricators, developers, and builders, understanding the AS2047 testing process provides transparency and peace of mind. In this article, we take you inside a NATA-accredited testing laboratory to explain step-by-step how windows are pushed to their limits to achieve AS2047 certification.

The Testing Apparatus: The Test Rig

The testing process takes place using a specialized chamber known as a window test rig. A full-scale, completely assembled production window (including all framing, glass, seals, and hardware) is securely mounted into the face of a sealed pressurized chamber. Sensors, displacement gauges, and water spray grids are carefully calibrated around the specimen.

+---------------------------------------------------------+
|                  AS2047 LABORATORY TEST RIG             |
|                                                         |
|  [Pressurized Air Chamber] <--> [Window/Door Specimen]   |
|               ^                        ^                |
|               |                        |                |
|       (Air Pumps: +/- Pa)      (Water Spray Grid)       |
+---------------------------------------------------------+

Step-by-Step Breakdown of the AS2047 Testing Sequence

The standard dictates a specific sequence of tests that must be executed in order. A failure at any stage means the window fails to achieve that specific rating class.

Step 1: Operating Force Test

Before structural loads are applied, the window is tested for usability. The force required to initiate and maintain the motion of a sliding sash, or to open a hinge/awning sash, is measured. It must fall within user-friendly limits to ensure accessibility.

Step 2: Air Infiltration Test

This test measures air leakage. The chamber is pressurized (both positive and negative pressures, typically at 75 Pa). Airflow meters measure how much air escapes through the frame joins and seals.

• Air-conditioned buildings: Must achieve a maximum leakage of $1.0\text{ L/s/m}^2$.
• Non-air-conditioned buildings: Must achieve a maximum leakage of $5.0\text{ L/s/m}^2$.

Step 3: Structural Deflection Test

To ensure structural integrity under day-to-day wind loads, the window is subjected to its Serviceability Limit State (SLS) wind pressure.

• Air pressure is gradually increased inside the chamber to mimic high winds.
• High-precision digital gauges measure how much the aluminum frame bends.
• To pass, the deflection of any structural member must not exceed $1/150\text{th}$ of its length (for single glazing) or $1/180\text{th}$ (for double glazing).

Step 4: Water Penetration Test

This is often where non-compliant windows fail. Continuous, uniform water streams are sprayed onto the exterior face of the window at a rate of $3.0\text{ L/min/m}^2$ while simultaneously applying continuous positive air pressure.

The test runs for 15 minutes. To pass, there must be zero water leakage or penetration onto the internal face, sill, or inside the building envelope.

Step 5: Ultimate Strength Test

The final and most destructive phase. The window is subjected to the Ultimate Limit State (ULS) wind pressure, which is at least 1.5 times higher than the SLS pressure.

The window must hold this extreme pressure (positive and negative) for at least 10 seconds. The frame and glass must not break, shatter, collapse, or blow out of the wall opening.

The Value of a NATA-Accredited Test Report

Once a window line successfully passes these stages, the testing laboratory issues an official compliance certificate backed by NATA (National Association of Testing Authorities).

As a premium manufacturer, MEICHEN Windows & Doors subjects our ultra-slim structural systems to these meticulous laboratory conditions. Our test certificates provide clear evidence that our architectural profiles are engineered to perform flawlessly under the toughest conditions.