Double-glazing is a very effective way to save energy, for businesses or private dwellings. Single glazed windows are sometimes referred to, as " thermal holes" because they lose around 33% of energy via the glass surface, regardless of how thick or thin the lass may be. Energy loss also occurs through the window's frame especially when the frame is made from aluminum. The payback time for high-insulated double-glazing is around five years. When ordering or installing double-glazing, make sure the transparent surface is not made from plastic. 

The best-insulated window is double glass where the cavity between the two-three glass sheets is filled with argon gas. Ask for a guarantee and always get it in writing. The insulating factor is generally referred to as a U-value. A single glazed window loses around 200 watts per square meter, which means that 200W extra power is required to heat or cool the space, so, if you add up the square meterage of your windows, as an example, it adds up to five square meters in surface, you will an extra 1kWh due to the energy loss through that window. Where double-glazing is installed, a much smaller heating or cooling system can first of all be installed using less energy and amortize the extra double glazing installation cost fairly rapidly, also due to the fact of heating and cooling are hardly needed. Double-glaze and save. Double-glazing saves amazing amounts of energy. 

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