Energy Efficient Windows
Reduce your carbon footprint and heating bills with our energy-efficient windows. We're always at the forefront of technology and recent advances mean our energy-saving windows are more effective than ever. Each window is tested and rated, so you know exactly how effective it is at keeping out the cold, retaining heat and saving you money.
Energy efficiency and reducing your carbon footprint is important to many Anglian customers. To help you compare the effectiveness of each of our energy efficient windows, we use the energy ratings system developed by the British Fenestration Rating Council (BFRC), which is the UK’s nationally recognised scheme for measuring window energy efficiency. The BFRC scheme is used in Building Regulations to show compliance for window replacements; to comply, every window must achieve a C rating or above.
Each window is assessed to measure how well it prevents heat loss, keeps draughts out and how well it absorbs natural free energy from the sun. This combination of factors gives an overall energy rating, ranging from A+ to G, with A+ being the highest rating.
Our uPVC windows achieve an A rating as standard - meaning that they gain more of the suns free energy than they lose through thermal transmittance. Ratings of A+ and A++ are also possible on our uPVC windows. Our A+ double glazed option makes the most of solar energy. While our triple glazed options, available up to an A++, offer the best in reducing heat loss. By installing Anglian’s windows, you’ll be confident your home will be as warm as possible, saving you money at the same time.
All our uPVC double glazing windows achieve an A rating as standard. The higher the rating, the more energy your windows save, which not only makes your home warmer, but helps to keep your heating bills lower. There’s environmental benefits, too. By consuming less energy to heat your home, you’ll also be reducing your CO2 emissions.
Switching from single glazing to our A rated energy saving double glazed windows will save money and significantly reduce heat loss. Even replacing older double glazed windows to our modern A rated double glazed windows will make a difference. For all round energy performance as well as other benefits, such as better soundproofing and security, you can choose triple glazed windows, which also achieve up to an A++ rating.
Our A rated windows are available in a number of styles and for even greater energy efficiency, you can upgrade to A+ glass in some styles or opt for triple glazing, which is particularly beneficial for hard to heat rooms.
Explore Window Styles & Designs
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Casement
Our ever-popular casement windows suit any type of property and we’ll make them in the configuration of your choice.
Explore Casement
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Cottage
Opt for a country look with cottage windows – the perfect blend of traditional style and modern, energy-efficient technology.
Explore Cottage
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Bay
Maximise the light and space in your room with a bay feature window, combining casement panels any way you choose.
Explore Bay
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Sash
Sliding sash windows are a traditional and elegant style, with one or more movable sashes that can be fully or partially opened.
Explore Sash
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Tilt and turn
A popular replacement window, this design can be tilted inwards for ventilation or turned 90 degrees for easy cleaning.
Explore Tilt and turn
| Casement | Sash | Tilt & Turn | Bay | Cottage | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| uPVC | Wood | Alu | uPVC | Wood | uPVC | Wood | uPVC | Wood | Alu | uPVC | Wood | |
| A++ rated | ✔ | - | - | - | - | - | - | ✔ | - | - | - | - |
| A+ rated | ✔ | - | - | ✔ | - | ✔ | - | ✔ | - | - | ✔ | - |
| A rated | ✔ | ✔ | - | ✔ | ✔ | ✔ | - | ✔ | ✔ | - | ✔ | ✔ |
| B rated | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | - | ✔ | ✔ | ✔ | ✔ | ✔ |
| Triple Glazing | ✔ | - | - | - | - | ✔ | - | ✔ | - | - | - | - |
| Sound Reducing | ✔ | - | - | ✔ | - | ✔ | - | ✔ | - | - | ✔ | - |
Key performance factors for energy rating
Energy ratings are calculated by measuring three performance factors:
1. Thermal transmittance, (U value) - which measures how well your window retains heat. The lower the amount of heat lost and U value, the warmer your home will be.
2. Solar, (G factor) - this evaluates how well your window harvests the sun’s natural heat. Expressed as a number between 0 - 1, the higher the number, the better your window is at capturing heat.
3. Air leakage, (L factor) - measures how airtight your windows are. The lower the L factor, the less draughty your window will be.
The combination of these three factors provides an overall energy rating for each window.
We design every window with our three values in mind
Security
Your security is of paramount importance, so at Anglian we manufacture windows to reflect this importance. Each window is made with robust multi-chambered uPVC with welded joints for added strength against forced entry.
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Energy Efficiency
All our windows achieve a high energy rating, with triple glazing guaranteeing maximum performance. With recent advancements in glass technology, our windows are more energy efficient than ever, saving you money or heating bills and helping to cut carbon emissions.
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Sound Reduction
All our ‘A’ rated windows provide a sound protection level of 31dB, however our ‘Safe and Sound’ range goes further for those living by busy roads, flight paths and railways.
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Why Choose Anglian?
We understand that replacing your windows can be daunting, so one of the Benefits of Anglian Glazed Windows is the way we guide you through the process. We make things simple, so you can relax knowing you're in safe hands as we transform your home. And, as you can see below, you can also be confident about your windows' quality and the strength of our guarantees.
Quality
We're always focused on quality, which is why every Anglian window is energy efficient. We combine the latest technology with skilled craftsmanship to create your designs:
- Measured by the British Fenestration Rating Council for energy efficiency
- BBA certified products
- Fast, professional installation
- Made in Britain
Guarantee
We build our windows to last, using top-quality materials and skilled craftsmanship but, should you ever need us, our guarantees mean we'll be there:
- 10-year guarantee on uPVC, wood and aluminium
- 5-year guarantee on stained wooden windows
- 15-year guarantee on our Ultra gas filled units
- Additional Glass & Glazing Federation (GGF) protection
Our Accreditations
Customer Reviews
Windows FAQs
Find out more about double and triple glazing in our useful Window FAQs Section or read our articles below
- What are the benefits of glazed windows?
- How does triple glazing work to save energy?
- Window energy ratings explained
Anglian FAQs
Got questions about choosing Anglian? Find out why Anglian is the right choice for your replacement windows.
- Secured by Design Award for Anglian
- What should I expect from Anglian's Window installation process?
- Read our 50 year story
6 steps to your new windows
Our privacy policy explains how we use your data.
Home Inspiration From Anglian
We've information about how to improve your home's energy efficiency, advice on ways to be eco-friendly and lots of interior design suggestions that you'll be itching to try in our "Good to be Home" online magazine. Take a look and be inspired!