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2. National Fenestration Rating Council - Wikipedia

   en.wikipedia.org/wiki/National_Fenestration...

   The organization was founded in 1989 [2] by a group of window and door industry professionals in response to mounting pressure from local and national governments to standardize energy efficiency ratings for windows and doors. Before NFRC standardized energy efficiency ratings, each manufacturer developed their own methods.

3. Window insulation - Wikipedia

   en.wikipedia.org/wiki/Window_insulation

   Energy-efficient houses in cold climates often feature triple-glazed windows with a U-value between 0.19 and 0.26. In moderate and hot climates, quality double-glazed windows with a U-value of about 0.30 are generally a more cost-competitive and effective choice. [6]

4. Home Energy Rating - Wikipedia

   en.wikipedia.org/wiki/Home_Energy_Rating

   The Home Energy Rating is an American estimated measurement of a home's energy efficiency based on normalized modified end-use loads (nMEULs). [1] In the United States, the Residential Energy Services Network (RESNET) is responsible for creation and maintenance of the RESNET Mortgage Industry National Home Energy Rating Standards (MINHERS), a proprietary system of standards, [2] which includes ...

5. Use energy-efficient windows and save more with energy tax ...

   www.aol.com/2009/03/06/stimulate-savings-with...

   For premium support please call: 800-290-4726 more ways to reach us

6. R-value (insulation) - Wikipedia

   en.wikipedia.org/wiki/R-value_(insulation)

   Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value (in K⋅m 2 /W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]

7. Enermodal Engineering - Wikipedia

   en.wikipedia.org/wiki/Enermodal_Engineering

   Enermodal Engineering was founded in 1980. [1] Initially, the firm was focused on developing software for the assessment of renewable energy systems and building energy usage being able to analyze the performance of windows from an energy standpoint.