Table of Contents Section Page List of Figures 2 Introduction 3 Definitions 4 Current Options In Widow’s Energy Efficiency 5 Understanding How Energy Moves Through Windows 5 Different ways Energy Travels 5 How is Energy in Windows Measured 6 R-values / U-values 6 Types Of Glazings In Windows 6 Low-e Glazing 7 Spectrally Selective Coatings 7 Heat-Absorbing Glazings 8 Reflective Coatings 8 Tomorrow’s Options for More Efficient Windows 8 Superwindows 8 Summary/Conclusions 10 Recommendations 11 References Cited 12 List of Figures Figure Page 1. How energy flows through windows: Radiation 6 2. How energy …showed first 75 words of 1742 total…

…showed last 75 words of 1742 total…than if you live in Colorado where is cheap. 3. How long do you plan to live in your home?: Good efficient windows are a big investment. And if you plan to live in your house for a long time then it will save you a lot of money in the long run, but if you only plan to live in a house for a couple of years only, then the price is hard to justify.