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Learn how to identify your window frame construction type and select the correct U-value for better insulation. Understand the importance of knowing your glass type for energy efficiency.
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Table 2 Please turn to page 275.
This page is Number 1 grouping of windows. The next step is to know which ‘Type of Frame Construction’ you have. But it has 3 subdivisions. Now you will be able to select the correct ‘U’ value. Do not be concerned about the SHGC value, only the ‘U’ value. So make sure you know the type of glass you have.