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01268 681612
'UK Manufacturers of Quality Aluminium Windows & Doors Since 1985'
Window Energy Ratings (WER's)
Since the changes to Part L of the Building Regulations in October 2010 there is a new method of complying to the building regulations. Part L of the building regulations (Conservation of fuel and power) is the area of the Building Regulations that covers thermal efficiency and energy efficiency. Previous to these changes, in order to get windows and doors to comply you needed to achieve a good overall U-value or specify a sealed unit with a centre pane U-value of 1.2 or less. The lower the U-value the less heat is lost through your windows.
Complying by simply specifying a sealed unit with a U-value of 1.2 has since been scrapped and replaced with the Window Energy Rating Scheme. The aim was for the WER to simplify, for consumers, the more complicated values for thermal efficiency, solar gain and air leakage into one basic A-G rating for overall energy efficiency.
Durations A Rated Windows
Many companies claim to have ‘A’ Rated Windows, always ask to see a WER rating scheme certificate or simulation certificates. Click to see our BSI certificate.
Duration Windows has been fully certified by BSI and fully registered with the British Fensestration Ratings Council (BFRC) in respect of the Window Energy Rating Group Scheme. The BFRC Scheme is the UK's national system for rating the energy efficiency of windows and is recognised within the Building Regulations as a method to show compliance for your replacement windows installation.
The British Standards Institute or BSI is the approved independent agency that is responsible for auditing our manufacturing process and window systems. They have to ensure that we are in a position to fabricate and provide customers with a product, which is compliant in the respect of Window Energy Rating Group scheme.
If you wish to find out more information or wish to enquire about our Premium Plus ‘A’ Rated Windows, please don’t hesitate to contact us.
| Aluminium A Rated Windows | Ordinary PVCu Window |
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| Awarded ‘A’ rating for energy efficiency |  |
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| Around a 10% reduction in heating bills | |
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| Increase in comfort due to less heat loss | |
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| Thin slim-line frame | |
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| Recyclable indefinitely | |
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| Built to last | |
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| Resistant to corrosion | |
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| Low maintenance | |
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Other Information
Contact Information
- We are based on
- Canvey Island,
- in Essex,
- Get An Address »
- T: 01268 681612 (Office)
- T: 01268 695100 (Showrooms)
- F: 01268 510058 (Office)
- E: sales@duration.co.uk
©2024 Duration Windows. We reserve the right to change specifications.
We continuously wish to improve and we kindly inform you that all incoming and outgoing phone calls may be recorded for quality and training purposes.