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Fact Sheets & Publications

  • State Fact Sheets for New and Existing Construction

    State Fact Sheets

    The EWC State Fact Sheets provide a simple, portable step-by-step guide to selecting energy efficient windows considering the conditions in that state. Each one summarizes the key considerations found elsewhere on this site, and provides a summary of results from the Window Selection Tool for key cities in that state.

  • State Code Guides

    State Code Guides

    The International Energy Conservation Code (IECC) is a model energy code, which can be adopted in whole or in part by individual states. It is updated every three years, with the most recent version being the 2012 IECC. These State Code Guides help determine what the IECC requirements for each state and county would be under various versions of the code.

  • Books


    Two comprehensive resources on window energy performance are the residential and commercial windows books written by EWC partner organizations at the University of Minnesota, Lawrence Berkeley National Laboratory (LBNL) and Oak Ridge National Laboratory (ORNL). Each book provides an in-depth look at how window technologies work, how they impact energy performance of a building, and other key information.

  • Other Fact Sheets and Resources

    • Window Energy Efficiency Solutions for Public and Affordable Housing (PDF)
      Summarizes key considerations important to public and affordable housing developers who are considering replacing their windows.
    • Energy Efficient Windows for Mid- & High-rise Residential Buildings (PDF)
      Mid- and high-rise buildings often have higher limits for structural performance for their windows, which to some extent must be traded off against energy performance targets. This fact sheet summarizes the issues in these buildings, and provides recommended energy performance targets that take into account structural considerations.
    • Lead Paint and Window Replacement: Challenges and Opportunities (PDF)
      Many homes still contain lead paint, which can be a health hazard; windows with lead paint are often inefficient single-pane windows. Replacing these windows can have benefits for both health and energy efficiency.
    • Tools for Schools (PDF)
      Daytime use, typical room layout, and the needs of students all have an impact on the window choices in schools. This factsheet introduces some of these key concepts and their impact on window selection.
    • Measure Guideline: Energy-Efficient Window Performance and Selection (PDF)exit disclaimer
      This document, from the Building America Program, provides guidelines for the selection of energy-efficient windows in new and existing residential construction in all U.S. climate zones. It includes information on window products, their attributes and performance. It provides cost/benefit information on window energy savings as well as information on non-energy benefits such as thermal comfort and reduced HVAC demands. The report also provides information on energy impacts of design decisions such as window orientation, total glazing area and shading devices and conditions. Information on resources for proper window installation is included as well.
    • Measure Guideline: Wood Window Repair, Rehabilitation, and Replacement (PDF)exit disclaimer
      This measure guideline, from the Building America Program, provides information and guidance on rehabilitating, retrofitting, and replacing existing window assemblies in residential construction. The report provides information about methods to improve the energy and comfort performance of existing wood window assemblies, while considering considers component durability, in-service operation, and long-term performance of the strategies.