How much can energy efficient windows save on heating bills?
Replacing single glazing or outdated double glazing with modern A-rated windows can cut heat loss by up to 70%.
In a typical UK semi-detached home, this may save around £100–£300 per year on heating. Larger or detached homes often save even more, thanks to higher energy use and larger window areas.
Factors affecting savings include U-values, airtightness, window area, property type, and insulation quality.
Which window styles keep heat in?
Window style and sealing affect efficiency. Casement and tilt & turn windows seal closely, reducing draughts, while sash windows may allow more heat to escape.
Opting for high-performance, well-sealed windows helps reduce bills and improves comfort. Budget Windows can guide you toward the best styles for your home.
Understanding A, B, and C-rated windows
The WER system grades windows from A to C. A-rated windows are the most efficient, keeping warmth inside and cutting energy costs. C-rated windows meet minimum standards but offer less comfort and smaller savings.
Upgrading from C-rated to A-rated windows can reduce draughts, keep rooms warmer, and lower bills.
Why U-values are important
U-values measure heat loss and lower values mean better insulation. Typical U-value figures you’d expect to see include:
Single glazing: 5.0–6.0 W/m²K
Older double glazing: 2.8–3.0 W/m²K
Modern A-rated windows: 1.2–1.6 W/m²K
By reviewing both WER ratings and U-values, you can choose energy efficient windows that enhance comfort and cut heating costs. Budget Windows’ team can make selecting the right solution straightforward.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
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