Selecting Windows - Florida Solar Energy Center

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National Fenestration Rating Council
EfficientWindows.org How to Select an Energy Efficient Window Look for the Energy Star Look for a product that qualifies for the Energy Star in the Northern, Central, or Southern Climate Zone. To distinguish between Energy Star products, go to Step 2. Look for Energy Efficient Window Properties on the NFRC Label The key window properties are U-factor, Solar Heat Gain Coefficient (SHGC), and Visible Transmittance (VT). The NFRC label provides the only reliable way to determine the window properties and to compare products. For typical cost savings from efficient windows in specific locations, go to Step 3. Compare Annual Energy Costs for a Typical House Compare the annual energy use for different window options for a typical 2000-square-foot house in your state or region. region.
Page 1 and 2: Window Options Keeping cool in summ
Page 3 and 4: Finding the Right Window P It is mo
Page 5 and 6: Heat Transfer The three modes of he
Page 7 and 8: Heat Flows Through Windows Reflecte
Page 9 and 10: Knowing Where the Sun is P Radiatio
Page 11: N Garage Orientation and shading Mi
Page 14 and 15: Breaking sunlight into its various
Page 16 and 17: Parts of the solar spectrum 1.6 1.4
Page 18 and 19: Warm Objects Emit Radiation 10 8 10
Page 20 and 21: Spectral Selectivity for Cold Clima
Page 22 and 23: Reflected solar radiation Quantifyi
Page 24 and 25: Light to Solar Gain ratio - A measu
Page 26 and 27: One can use Coatings and Tints P Hi
Page 28 and 29: Cold climate glazings Admit and tra
Page 30 and 31: NIR Hot Climate Glazings Admit visi
Page 32 and 33: Direct Beam Solar Radiation Can pro
Page 34 and 35: Orientation & Shading Strategies Ga
Page 36 and 37: Exterior Block solar window gain be
Page 38 and 39: 1.0 0.8 0.6 0.4 0.2 Spectral Transm
Page 40 and 41: Hourly Building Energy Simulations
Page 42: What Can You Do to Get Energy Perfo
Page 48: Florida Green Home Certification Fl
Page 51 and 52: Guidance for the Average Building O
Page 53: Additional Information & Resources

Selecting Windows - Florida Solar Energy Center

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