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Energy Efficiency Explained

There are two main measures of energy performance relating specifically to windows and doors.

The first one is known as a Window Energy Rating (or WER). It’s a familiar system, similar to that used on domestic appliances.

Under current Building Regulations, windows and doors must be rated at Band ‘C’ or better. We’re pleased to say that all of our windows reach Band ‘A’ giving you an exceptionally thermally efficient window system for your home.

Should you wish to upgrade the energy rating from our standard A rated products we can incorporate low iron glass or triple glazing to achieve A+ ratings.

The second measure is known as a U-value. U-values measure thermal transmittance. The lower the value, the more effective an insulator the window is. However, very low U-values may mean that you do not gain as much warmth from the sun via passive solar gain.

Energy-efficient windows will reduce the costs of heating your home and your carbon footprint. But they also make your home a more comfortable place to live, eliminating drafts, cold spots and condensation, while also helping to insulate your home from external noise.

When we register your installation with CERTASS we confirm the energy rating of A and your certificate is issued based on your windows’ energy rating compliance with building control approved documents.

Double Glazing in Leicester
Double Glazing in Leicester
Double Glazing in Leicester

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