Warmer Services
Energy Efficient Window 
What Does An Energy Efficient Window bring you? 
 
Building Regulations requires a replacement window to achieve an equivilent to a 'C' standard as seen on the consumer friendly trafficlight style A-E ratings guide (similar to that used on ‘white’ goods such as fridges, freezers, washing machines etc.) 
 
With carbon emissions high on the global agenda and the current high cost of fuel, we are all looking for ways to make our homes more energy efficient. 
So, to ensure that your home can stay as efficient as possible:- 
The windows that we fit have a U-Value of 1.3, the equivilent of an 'A' rating on the traffic light style rating guide. 
The technical info is:- 
The energy rating eg. -3kWh/(m²•K) so in this example the product will lose 3 kilowatt hours per square metre per year. 
The window has a U value eg. 1.3W/(m²•K) 
The effective heat loss due to air penetration as L 
eg. 0.01 W/(m²•K) 
The solar heat gain eg. g=0.43 
 
Simply put this will determine how well a product will perform the functions of: 
* Helping you contain and conserve heat within your building in the winter 
* Keep out the wind 
* Help resist condensation 
* Contribute to improved sound insulation 
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