New double-glazed windows from Everest could retain up to 4 times more heat than standard single glazing, and double that of ordinary double glazing. The table below shows what difference that makes.
How much can you save with
'A' rated windows?
| £ saving with Everest 'A' rated windows per year | £220 |
| £ saving with Everest 'A' rated windows over 20 years | £12,536 |
| Annual CO2 saving with Everest 'A rated' windows | 1.8 tonnes |
Calculation based on a detached house with 20m2 of glazing, upgrading from single glazed timber windows. Assuming energy prices increase by 10% per year. Energy prices have increased by 12% per year over the past 5 years (Source: Energywatch and ONS)