The Government approved Window Energy Ratings scheme
Rates windows on a scale from G being the lowest up to A+ being the most energy-efficient windows. The current building regulations concerning the energy efficiency of homes require that windows are a minimum of band C however most window companies are aiming to provide the homeowner with the highest energy efficiency achievable at a good price.
The type of low-e glass used in the window glazing is not the only factor affecting the Window Energy Rating of an energy efficient window. Other factors bring about significant changes in the rating and these can be achieved by:
– improve the window g-value (amount of free heat from the sun the window lets in) without compromising the U-value, or
– improve the window U-value (the degree to which it stops heat escaping from your home) without reducing its g-value.
Using inert gas, such as argon, in the cavity and/or a so-called warm edge spacer bar will improve the insulating glass Ug-value. Using a low-iron glass such as Pilkington Optiwhite™ will improve the g-value. The magnitude of the benefits will depend on non-glass factors such as the frame U-value and percentage frame factor (proportion of frame to glass). Therefore, by combining the best available technologies, it has been proved commercially possible to achieve A-rated windows without the need for triple glazing or costly krypton filling.
With Window Energy Ratings, we have a system which recognises the positive energy gains through windows. This means that windows can be acknowledged as contributors to positive energy efficiency of buildings meaning that legislators and specifiers can stop thinking in terms of reducing window areas. This means the extensive use of glass can easily be incorporated in energy efficient homes.
Energy-efficient glass for your home
Replacing the heat lost through your windows can be expensive so dont throw your money out the window! Install low emissibity (low-e) energy-efficient windows to help to reduce your heating bills by up to 20% each year.
Using a product from our energy-efficient glass range in your windows will reduce your home’s carbon co2 output, making your carbon footprint smaller and your home more enviromentally friendly.
We offer a range of low-e energy-efficient glazing to suit every type of property, from a modern home to an older traditional styled home.