Every building has gaps. In exterior windows and doors, those gaps are invisible to the naked eye, but they show up clearly on energy bills and in the form of drafts, condensation, and frost. Over time, small amounts of air infiltration can undermine a building's thermal performance and drive up operating costs.
That's why air leakage testing exists. For anyone specifying exterior windows or doors in new construction or a retrofit, ASTM E283 is the standard that tells you how well an assembly seals.
What Is ASTM E283?
ASTM E283 is the Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference, published by ASTM International.
The standard measures how much air passes through the gaps, seals, and joints of an exterior window or door assembly under a controlled pressure difference. The result is a quantified air leakage rate. The lower the number, the tighter the seal, and the better the assembly performs against energy loss, drafts, and moisture infiltration.
How Does It Measure Air Leakage Through Exterior Windows, Curtain Walls & Doors?
During testing, a window or door assembly is installed in a laboratory test frame and subjected to a standardized static air pressure difference, simulating real-world wind pressure conditions. Specialized equipment then measures the volume of air passing through the assembly.
Testing parameters include:
- Standard test pressure: 1.57 psf (75 Pa), though higher pressures may be used depending on application or local code requirements
- Measurement unit: Cubic feet per minute per square foot of frame area (cfm/ft2)
- Comparison benchmark: Results are evaluated against industry benchmarks or project-specific performance criteria
Because the test is standardized and repeatable, architects, engineers, and specifiers can make accurate comparisons across different window and door systems.
Where Is the ASTM E283 Standard Applicable?
ASTM E283 applies to any exterior window, curtain wall, or door assembly. It is commonly referenced in:
- Commercial and institutional construction projects where energy codes require documented air leakage performance
- New construction and retrofit projects where building envelope performance must meet state or local energy standards
- Projects pursuing sustainability certifications or energy-efficiency benchmarks
- Security upgrade projects where exterior assemblies must meet both protective and thermal performance requirements
For security specifiers, that last point is especially important. Exterior protective assemblies, including those with bullet-resistant glazing, are thicker and heavier than standard window systems. That additional material can conduct heat and cold more efficiently, creating condensation, frost buildup, and energy loss if the framing system isn't designed to compensate. Specifying a frame tested to ASTM E283 ensures that a security upgrade doesn't come at the cost of building performance.
ASTM E283 Is Part of the Testing for TSS's Thermally Broken Frames
TSS's thermally broken framing system (650 TB) is engineered for both bullet resistance and thermal performance in exterior windows and doors. ASTM E283 is one of several standards the 650 TB has been tested to, alongside:
- UL 752 Standard for Bullet Resistant Materials
- ASTM E331 Standard Test Method for Water Penetration of Exterior Windows and Doors
- ASTM B221 Standard Specification for Aluminum and Aluminum Alloy Extruded Bars, Rods, Wires, Profiles and Tubes
- ASTM B209 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
The result is a framing system that protects people, performs in the elements, and supports a building's long-term energy efficiency.
Frequently Asked Questions About ASTM E283
Is ASTM E283 required by building codes?
ASTM E283 itself is a test method, not a code requirement. However, many building codes and energy standards reference it as the accepted means of verifying air leakage characteristics for exterior windows, curtain walls, and doors. Whether it's required on your project will depend on your jurisdiction, building type, and applicable energy code.
What is a passing result for an ASTM E283 air leakage test?
There is no universal pass/fail threshold built into the standard. Acceptable air leakage is defined by the applicable building code, project specification, or performance criteria established by the design team. For commercial projects, ENERGY STAR and AAMA standards often serve as the reference benchmarks when performing air leakage tests on exterior windows and curtain walls.
Can ASTM E283 be performed at different pressure levels?
Yes. While the standard specifies 1.57 psf (75 Pa) as a common test pressure, testing can be conducted at higher specified pressure differences to reflect more demanding climate conditions or project requirements. Higher specified pressure differences produce more rigorous results and are sometimes required for buildings in high-wind zones or those subject to stricter energy performance standards.
How is resulting air leakage used to evaluate window and door performance?
The resulting air leakage figure from an ASTM E283 test gives specifiers a quantifiable, documented performance record. That number can be submitted during construction review, used to satisfy third-party verification requirements, and kept on file as proof that an assembly met the specified performance criteria at the time of installation.
Is all air movement through windows, curtain walls, and doors counted in the results?
Not exactly. The standard is structured to capture only such leakage as occurs through the assembly's movable components, seals, and framing, not through the glass itself, which is assumed to be airtight.
Related Resources
Our goal is to help you make informed decisions that protect your people, secure your assets, and support your mission—without sacrificing design or functionality. These resources offer guidance for your project.
Ballistic Door Solutions Guide
10 Things That Make or Break a Bullet Resistant Barrier Project
Guide to Improving Physical Security By Addressing the Human Factor
