Humber/Ontario Real Estate Course 3 Exam Practice

Which feature of a window enhances energy efficiency by reflecting long-wave radiation?

1. Glazing

2. Inert gas fill

3. Low-E

4. Triple Pane

5. U-value

6. Vacuum Sealed

The correct answer is: Low-E

The feature of a window that enhances energy efficiency by reflecting long-wave radiation is Low-E (low emissivity) coating. This specialized coating is designed to minimize the amount of infrared and ultraviolet light that can pass through the glass without compromising the amount of visible light transmitted. By reflecting long-wave infrared radiation, which is a major contributor to heat loss, Low-E windows help maintain a consistent indoor temperature and reduce energy costs. In contrast, while glazing refers to the glass components of a window, it does not specifically indicate energy efficiency features like Low-E does. Inert gas fills, such as argon or krypton, are often used to improve insulation but do not inherently reflect radiation. Triple pane windows enhance insulation simply by providing more layers of glass but do not specifically focus on reflecting long-wave radiation. U-value is a measure of thermal performance, indicating how well a building element conducts heat, which is related to efficiency but not a specific feature like Low-E coating. Vacuum sealing can enhance insulation, but it is not a standard feature that specifically addresses long-wave radiation.