Calculate U-Value of Windows
U-Value, or thermal transmittance, is a measure of the rate of heat transfer through a window due to a temperature difference. Calculating the U-Value of windows is crucial for energy efficiency and comfort in buildings.
- Enter the width and height of your window in meters.
- Select the glazing type: single, double, or triple glazed.
- Click ‘Calculate’.
The U-Value is calculated using the formula: U = (Wt + Wf + Wg) / (A + B + C), where…
For more information, see the U.S. Department of Energy and the National Renewable Energy Laboratory.