Thermal Performance

Insulated windows not only help keep heat from escaping a home on cold nights but also stop solar radiation from overheating a home on hot days. This lesson describes the glazing technologies used to reduce solar heat gain and minimize heat loss.

Learning Objectives

At the conclusion of this lesson, you will be able to:

• Describe how low-e coatings work
• Explain the differences between different types of low-e coatings
• Compare low-e coatings to spectrally selective coatings
• Select the type of glazing best-suited to various climate conditions
• Describe the energy advantages of low-e coated windows
• Compare low-e and spectrally selective coatings to tinted glass Identify design alternatives to reduce solar heat gain

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