What is Energy Efficient Glazing?
Energy efficient glazing is the term used to describe modern double or triple glazed windows that use coated low emissivity glass to prevent heat escaping from your home. Unlike older single glazed or early double glazed units, modern energy efficient glazing can dramatically reduce your heating bills and your carbon footprint.
Low emissivity glass, commonly known as low e glass, has an invisible coating that dramatically reduces heat transfer and reflects interior heat back into your room. Pilkington K Glass is the most well known product of this type in the UK, though Pilkington K Glass S and Pilkington Optitherm can offer enhanced thermal performance for properties with very high heat loss.
Many older double glazed units do not contain low e glass and are therefore far less energy efficient than modern equivalents. By replacing your existing glass with low e glazing, you can more than double the energy efficiency of your windows compared to older double glazing with no low e coating.
Reduce Heating Bills
Pilkington energiKare windows can reduce your annual heating bills by up to 20 percent. A typical semi detached house can save up to £7,000 over the lifetime of the windows.
Lower Carbon Footprint
A gas heated semi detached house can save up to 0.72 tonnes of CO2 per year by switching from single glazing in timber frames to Pilkington energiKare in uPVC frames.
Conservatories Too
Low e glass is especially important for conservatories and sun rooms where a high proportion of the surface area is glazed. It retains heat in winter and can be combined with solar control glass to reduce overheating in summer.
Window Energy Ratings Explained
Windows are rated under the Government approved Window Energy Rating scheme on a scale from G to A plus, similar to the rating labels on household appliances. The higher the rating, the more energy efficient the window.
- A plus rated windows offer the highest level of energy efficiency available
- A and B rated windows meet the Energy Saving Trust recommendations
- Pilkington energiKare units from SC Glass qualify under this scheme
- Suitable for uPVC, timber and metal framed windows of any age
- Pilkington Optiwhite glass increases solar gain from outside for additional warmth
South and West Facing Windows
For south and west facing glazing where overheating can become a problem during summer, we recommend solar control glass such as Pilkington Activ SunShade. This reduces glare and heat build up while still allowing natural light into your home.
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