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When shopping for new windows, you may have noticed an energy rating label, similar to those seen on appliances like refrigerators or washing machines. Window Energy Ratings (WERs) are a crucial consideration when selecting windows for your home, as they can significantly impact your home’s energy efficiency, comfort levels, and utility bills. This guide by Sheerwater Glass aims to help you understand what these ratings mean and how to make the best choice for your home.
What are Window Energy Ratings?
The British Fenestration Rating Council (BFRC) developed the Window Energy Rating scheme to measure the energy efficiency of windows. The rating scale ranges from A++ (most efficient) to E (least efficient), calculated based on three primary factors: thermal transmittance (U-value), solar factor (G-value), and air leakage (L-value).
Thermal Transmittance (U-value)
The U-value measures how well a window can prevent heat from escaping from inside the building. The lower the U-value, the better the window is at keeping heat in.
Solar Factor (G-value)
The G-value measures how well a window lets in free heat from the sun (solar gain). The higher the G-value, the better the window is at utilising natural solar heat, reducing the need for additional heating.
Air Leakage (L-value)
The L-value measures the amount of air that can seep through the window. Lower L-values are better, as they mean less cold air can enter and warm air can escape from your home.
Why are Window Energy Ratings Important?
Understanding Window Energy Ratings allows you to choose the windows that will most efficiently keep your home warm in the winter, cool in the summer, and reduce your energy bills. According to the Energy Saving Trust, energy-efficient glazing could save up to £110 per year on your energy bills. Higher-rated windows may have a slightly higher upfront cost but will save you money in the long term.
Moreover, energy-efficient windows are environmentally friendly. The UK government has reported that residential energy use accounts for around 20% of the UK’s carbon emissions. By reducing the amount of energy needed to heat and cool your home, you’re reducing your carbon footprint, contributing to the fight against climate change.
Sheerwater Glass and Energy Ratings
At Sheerwater Glass, we are committed to providing our customers with the highest quality energy-efficient windows. We understand the importance of energy efficiency for your comfort, wallet, and the environment.
Our team will help you understand the Window Energy Ratings of our products, ensuring you make an informed decision that meets your specific needs. We’re proud to offer a range of windows that meet and exceed the highest energy rating standards, providing you with superior insulation, warmth, and savings.
In fact, according to the BFRC, replacing all single-glazed windows in a typical semi-detached house with A++ rated double glazing could save you between £85 and £110 per year on your energy bills.
Invest in the comfort of your home, reduce your energy costs, and contribute to a healthier planet by understanding and considering Window Energy Ratings when choosing your next windows. Trust Sheerwater Glass to guide you through the process and provide the highest-quality, energy-efficient windows for your home.
