Window U Value Chart
Window U Value Chart. Our Origin aluminium products provide the following typical U-Values on windows and approximate Window Energy Ratings (WER's) with the following glass specifications. R-Value: the amount of heat retained by the window.
R-Value: the amount of heat retained by the window. The lower the U-value the better the insulation properties of the aluminium window - the better it is at keeping the heat or cold out. R-value is the insulative value to resist heat flow, the higher the number the better.
A U-value calculated by us should be sufficient to satisfy the requirements of Building Regulations.
The measure of heat resistance of the glass is implies a measure of This tool provides some of the most common options on windows and doors and related NFRC certified values.
Lower is better with U-factor--the opposite of R-value, when higher is better. To access those tables, select the individual product of interest and scroll down to the Professional Resources section. Energy performance data for select combinations of options is available in table format on each product page.
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