Efficiency within double glazed windows is measured by its U-Value of the entire unit, including glass. The lower the number, the more insulated the window or door.Calculate Energy Savings uPVC Windows

    • A typical single glazed aluminium window generally rates at about 7.0
    • A typical double glazed aluminium window generally rates at about 4.5
    • A typical uPVC double glazed window rates up to 1.8
    • A typical uPVC triple glazed window rates 0.7

The above U-Values indicate the potential to save valuable heating and cooling energy being lost through your windows.

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