Blower Door Testing in Seattle

QED LAB was proud to perform whole building air barrier testing at the Astra Hotel, a modern hospitality development located in the heart of Seattle’s South Lake Union district. As one of Seattle’s fastest-growing neighborhoods, South Lake Union continues to see significant commercial and mixed-use development, making energy efficiency and high-performance construction more important than ever. In 2021, QED LAB completed whole building air leakage testing at the Astra Hotel in full compliance with the Seattle Energy Code, helping verify the performance of the building envelope before project completion.

The Astra Hotel is positioned within one of Seattle’s most active urban corridors, surrounded by technology, hospitality, residential, and commercial growth. With modern façade systems, large glazing areas, and complex building assemblies, projects like this require advanced testing methods to ensure the structure performs as designed under real-world conditions. Whole building air barrier testing in Seattle plays a critical role in confirming the integrity of the building envelope and identifying uncontrolled air leakage that could negatively impact energy efficiency, occupant comfort, and long-term durability.

For this project, QED LAB performed a whole building pressurization testing in Seattle using large calibrated blower door fan systems designed specifically for commercial structures. These systems allow technicians to pressurize and depressurize the building while measuring airflow leakage throughout the envelope. Testing was conducted in accordance with industry standards including ASTM E3158 in Seattle, ASTM E779 in Seattle, and ASTM E1827 in Seattle, which are commonly used to evaluate whole building air leakage performance for large commercial projects.

Seattle’s climate presents unique challenges for building envelope performance. Frequent rainfall, high humidity, and cooler temperatures create conditions where uncontrolled air leakage can contribute to condensation, moisture intrusion, and increased heating and cooling demands. Performing whole building air barrier testing helps ensure the building envelope is functioning as a continuous system, reducing the potential for air infiltration and improving long-term building performance.

Compliance with the Seattle Energy Code is another major component of projects like Astra Hotel. Seattle maintains some of the most progressive energy efficiency requirements in the country, placing a strong emphasis on airtight construction and building envelope verification. Whole building air leakage testing is often required to confirm the project meets specified performance targets before occupancy. By performing this testing during construction, project teams can identify and address any leakage concerns early, avoiding costly repairs or delays later in the process.

During testing, QED LAB technicians also work closely with contractors and project teams to identify potential leakage pathways around curtain walls, windows, penetrations, transitions, and other critical envelope components. Diagnostic tools such as smoke tracing and infrared thermography are often used alongside pressurization testing to pinpoint areas requiring additional sealing or corrective work.

Projects like the Astra Hotel highlight the growing importance of building envelope commissioning in Seattle and air barrier verification in modern construction. High-performance buildings require careful coordination between multiple trades and systems to ensure energy efficiency goals are achieved. Whole building testing provides valuable data that helps verify the quality of installation and the effectiveness of the overall air barrier system.

QED LAB is proud to support projects throughout Seattle and the Pacific Northwest with accredited air barrier testing, building envelope testing, and performance verification services. The Astra Hotel project is another example of our commitment to helping owners, architects, and contractors deliver durable, efficient, and code-compliant buildings built to perform for years to come.