What is the best energy rating for double glazing?
The best energy rating for double glazing is typically an A++ rating. This rating indicates that the windows have the highest energy efficiency and can significantly reduce heat loss, resulting in lower energy bills and a more comfortable living environment.
A++ rated windows are designed with multiple layers of low-emissivity (Low-E) glass, which helps to reflect heat back into the room while reducing heat loss through the glass. They are also filled with a dense insulating gas, such as argon or krypton, which helps to further reduce heat loss.
What is the lowest U-value for double glazing?
The lowest U-value for double glazing typically ranges from 0.8 to 1.2 W/m²K. The U-value measures how well the window insulates against heat loss, with a lower U-value indicating better insulation. The U-value of double glazing can vary depending on factors such as the number of layers of glass, the size of the gap between the glass layers, the type of glass used, and the type of gas used to fill the gap.