What is U value?

The thermal insulation effect of windows is the most important indicator for measuring the energy saving of windows. The meaning of U value (heat transfer coefficient) is the amount of heat transferred through an area of ​​1 square meter in 1 hour.

Simply put: the lower the U value (heat transfer coefficient), the better the thermal insulation effect of the window.

Since windows are made of profiles and glass, there are also certain distinctions when describing U values:

Ug = heat transfer coefficient of glass (g = glass)

Uf = heat transfer coefficient of window frame (f = frame)

Uw = heat transfer coefficient of the entire window (w = window)

If you buy Luyang profiles, please rest assured that all our products have undergone strict quality inspections and fully comply with the national insulation standards for energy conservation and environmental protection.