What is the g-value?

Also total energy transmittance. Percentage of incident radiation that is allowed to pass through the glass as a whole. Serves to use free solar energy gains. In contrast, solar control glasses have a low g-value to avoid excessive heating in summer.

The g-value is also known as energy transmittance. It indicates how much energy can penetrate through the window from the outside to the inside. The value is given in percent. In general, the higher the g-value, the more solar radiation can be released into the room through the glazing as radiant heat. A high g-value can therefore achieve an equally high heat gain in the room. In the winter months this is more pleasant, but in summer the high g_value contributes to a significant heating of the rooms. This value is particularly important for passive houses that rely on solar gains (up to 60% of the heating energy).

Welcome to ENERsign® Price Configurator with U-Value window Calculation:

You don’t want to go through the trouble of obtaining various offers, but would like to find out the recommended prices and U-values for our high-quality ENERsign®primus window? Then try our price configurator, here you can put together your desired windows as you wish and try out different sizes and designs.

All you need is the desired dimensions and window types and you can configure immediately. The window price and U-value window will be adjusted automatically, so that you always have an overview and can compare directly.

We are uncompromising in the product we offer:
ENERsign®primus elements with at least triple glazing with a U-value glass of 0.52 W/m²K and a g-value of 53%. Other designs and special glasses are available on request.

Welcome to the ENERsign® U-Value window configurator:

The U-value window is also called heat transfer coefficient and according to the standard DIN EN 10077 it indicates the amount of thermal energy lost through a window to the outside.

The U-value window is calculated using the formula W/(m²K), i.e. watts per square metre and Kelvin. This value refers to the entire window and defines the amount of energy per unit of time that flows through an area of one square meter when the air temperature on both sides differs by one Kelvin. The lower this value is, the less energy or heat the window emits.

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Gesamtpreis (inkl. 19% MwSt)
0€ - 0
Potentially avoided CO2 emissions over 30 years :
Potentially saved energy and CO2 costs over 30 years:
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0 (W/m2K)
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