In the North American market, windows and doors not only determine the aesthetics of a building but also directly impact its safety, energy efficiency, and weather resistance. The AAMA/WDMA/CSA 101/I.S.2/A440 (commonly referred to as the NAFS) standard is a core certification system in the U.S. and Canadian window and door industries. It covers key performance tests, including wind pressure resistance, water tightness, air tightness, structural strength, impact resistance, and security performance.

Compliance with North American Building Codes: Most North American building codes require windows and doors to comply with the NAFS standard, especially in coastal hurricane zones, cold climate regions, and high-rise building projects.
Enhancing Market Competitiveness: Products that obtain AAMA/WDMA/CSA 101/I.S.2/A440 certification are more easily accepted in the North American market and recognized by developers, contractors, and designers.
Ensuring Stability in Extreme Weather Conditions: NAFS certification ensures that windows and doors maintain excellent performance in severe environments such as strong winds, heavy rains, and cold and humid conditions, without compromising the overall safety and comfort of the building.

The Importance of This Test for Exporting to the North American Market

AAMA/WDMA/CSA 101/IS2/A440

Test Report

This document contains a partial test report for our G80 Casement Window with Fixed Window & 150 Sliding Door, conducted in accordance with North American standards. The report includes key performance evaluations such as air leakage, water penetration resistance, structural performance, and wind pressure resistance, ensuring that our product meets the stringent requirements set by ASTM and AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS). These tests verify the window’s durability, energy efficiency, and ability to withstand extreme weather conditions, making it suitable for various building applications across North America.

Casement Window

Sliding Door

Testing Procedures and Standards for AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS)

To meet North American market requirements, the NAFS standard includes several key tests to evaluate product performance under various environmental conditions.

Test Content

Measure the air leakage rate of doors and windows under specific pressure differentials (typically 75 Pa or 1.57 psf).
The air leakage is expressed in cfm/ft² (cubic feet per minute per square foot) or m³/h·m² (cubic meters per hour per square meter).
The typical test pressure ranges from 75 Pa (residential) to 300 Pa (commercial buildings).

1. Air Leakage Test（ASTM E283）

Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors

Purpose

Evaluate the airtightness of doors and windows, reducing air exchange and lowering building energy consumption.
Prevent issues such as heat loss, condensation, and dust infiltration caused by air leakage.
Meet North American energy efficiency regulations (such as ENERGY STAR® and NFRC certification), especially for energy-efficient buildings.

2. Water Penetration Resistance Test（ASTM E331/ASTM E547）

ASTM E547 – Standard Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Cyclic Static Air Pressure Difference

ASTM E331 – Standard Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference

On-Site Test Footage

Test Content

ASTM E331 Static Test
Continuously sprays water onto the window surface (typically 5 gal/h·ft² or 204 L/h·m²) while applying a constant air pressure (75-720 Pa).
Checks whether the sealing system effectively prevents water penetration.

ASTM E547 Dynamic Test
Simulates wind-driven rain by applying cyclic water spray (typically 3.4 L/min/m²) while imposing pulsating air pressure (pressure range 137-720 Pa).
Observes whether water penetrates the interior.

Purpose

Assess the water resistance of doors and windows under heavy rain and strong wind conditions to prevent water leakage, condensation, and wall damage.
Suitable for high-rise buildings, coastal structures, and rainy regions, ensuring a dry and comfortable interior.
Complies with North American building codes (such as IBC and CBC), especially for areas prone to heavy rain.

3. Structural Performance Test（ASTM E330）

Standard Test Method for Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference

Test Content

Positive & Negative Wind Pressure Simulation Test
Applies uniform static wind pressure to simulate the load conditions under daily design pressure (DP).
Measures the deflection of doors and windows to ensure compliance with standards.
Allowable Deflection Limits:
Window & Door Frames≤ 1/175 or 1/240 of the span.
Glass Units≤ 1/60 of the span.

Ultimate Load Test
Applies 1.5× Design Pressure (DP) to assess structural performance under extreme conditions (e.g., hurricanes).
Permanent deformation or damage to frames and connectors.
Breakage of glass.
Loosening or detachment of components.

Purpose

Verifies that doors and windows do not undergo excessive deformation under normal wind pressure, ensuring functionality and airtightness.
Ensures that doors and windows maintain structural integrity under extreme wind pressure, complying with North American building codes (IBC, CBC).

On-Site Test Footage

E331 Static Test

E547 Dynamic Test

On-Site Test Footage

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