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New and Underutilized Technology: High R-Value Windows

The following information outlines key deployment considerations for high R-value windows within the Federal sector. This information spans:

• Benefits
• Application
• Key Factors for Deployment
• Ranking Criteria
• Resources

Benefits

High R-value windows are highly insulated windows rated at triple pane, R5 or greater (U value 0.22 and lower).

Application

High R-value windows are appropriate for deployment within most building categories. These windows should be considered in building design, renovation, or during window replacement projects.

Key Factors for Deployment

High R-value windows are available within the Federal sector and should be considered in building design, renovation, or during window replacement projects.

The U.S. Department of Energy (DOE) has a volume purchasing program in place.

DOE has a research goal of an R10 window for deployment.

Ranking Criteria

Federal energy savings, cost-effectiveness, and probability of success are ranked 0-5 with 0 representing the lowest ranking and 5 representing the highest ranking. The weighted score is ranked 0-100 with 0 representing the lowest ranking and 100 representing the highest ranking.

Federal Energy Savings	Cost Effectiveness	Probability of Success	Weighted Score
3.7	2.0	4.0	65

Resources

The following resources are available:

• Cost-Effective Triple Pane and Low E Storm Windows: DOE webinar presentation originally presented in June 2010.

• Efficient Windows Collaborative: Organization whose members manufacture and promote energy-efficient windows, offering online information and resources to help readers choose and deploy energy-efficient windows.

• Zero Energy Windows: Lawrence Berkeley National Laboratory (LBNL) article covering energy-efficient window technologies and applications.

• National Fenestration Rating Council (NFRC): Organization covering energy performance rating and certification programs for fenestration products.

• Windows Volume Purchase Products Website: Online resource helping users research and locate volume window purchases.

• Highly-Insulating (R-5) Windows and Low-e Storm Windows Volume Purchase Program: Fact sheet overview provided by DOE covering the volume purchase program.

• Windows for High Performance Commercial Buildings: Design tool covering energy-efficient window integration.

• Windows and Daylighting Software Tools: LBNL list of software and tools for energy-efficient window and daylighting integration.