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Stephen Aki

Stephen Aki Technoform

Stephen Aki works for Technoform North America assisting window and door designers to develop sustainable, energy-efficient, high-performance systems. He has more than 10 years of experience in the fenestration industry and is a member of the National Fenestration Rating Council and the Fenestration and Glazing Industry Alliance. He can be reached at or 971/832-0502.

Thermal Expansion in Big Doors

The International Builders’ Show in Las Vegas provided a fascinating glimpse into the new and exciting trends in the market. One of these trends is that aluminum doors are getting much larger, with some fabricators showcasing doors as tall as 23 feet.

Achieve a High-Performance Door

Innovative thermal solutions can enhance U-factor performance in larger doors.

Gen Z Redefines Great Places to Work

Flexibility and professional growth are top-of-mind for the new generation of workers

How is Energy Performance in Windows Measured?

NFRC’s standardized physical tests and simulation methods provide specific fenestration performance information.

Understanding the NFRC Window Label

The NFRC label, issued for factory-built fenestration, or the label certificate, issued for site-built fenestration, provide performance data for thermal transmittance (U-factor), solar heat gain coefficient (SHGC), visible light transmittance (VT) and air-leakage (AL).

Implementing Innovation

Window and door products are constantly redesigned to meet increasing thermal performance requirements and yet, many under-utilized products could help meet high demand. These innovative solutions could reduce residential energy consumption while increasing homeowners’ thermal comfort.

Design Considerations for Hinge and Multislide Doors

We must apply the insights gathered from thermal simulations, consultants, design experts and energy advisors to develop the best possible solution. Drawing from all available information and innovation, you can engineer the optimal, holistic, high-performing hinge or multislide door.

Big Doors, Big Problems

Big doors seem all the rage these days, with large residential doors offering a unique and often spectacular focal point to a home. However, with big doors, come big design problems.