Educational Event

Understanding Fenestration U-Factors and Energy Code Compliance


AIA SW Wisconsin

The combination of evolving commercial energy codes and building requirements, mixed with a myriad of manufacturers’ performance data, often result in a misinterpretation of fenestration thermal performance. This presentation provides an understanding of fenestration total unit U-Factor, explains how different components of a window’s assembly (glass, aluminum framing and glass spacer) affect U-Factor, reviews testing methods for U-Factor, and provides guidance for developing accurate U-Factor specification language.

Learning Objectives:

  • Identify five attributes affecting fenestration U-Factor. Employ at least three design options to improve fenestration U-Factor.
  • Differentiate between NFRC and AAMA testing and certification processes.
  • Draft non-defective specification requirements for U-Factor.
  • Recognize other important energy related fenestration design factors and the importance of a balanced design.


Lunch is included. Registration is required.


Presented by Rick Hillesheim, Hillesheim Architectural Products, Inc. (Representing Tubelite, Inc.)


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