Looking for Energy Efficient windows?

Get the low-e performance leader from ENERsign!

ENERsign – The premium brand for energy-efficient windows and doors

ENERsign is the worldwide premium brand for windows and doors in the energy efficiency sector. For more than 25 years, our products have been appreciated and awarded all over the world for their patented engineering and design art “Made in Germany”. We combine a holistic consulting approach with excellent customer service.

ENERsign stands for wood-aluminium windows and doors with the highest standards of energy efficiency. The best insulation, low emissivity and air-tightness values can be achieved through the interaction of design and material selection.

Our windows and doors are certified by the Passive House Institute and will help you design Design Homes, Mountain and Ski Homes, passive houses or net-zero houses for thermal comfort, energy efficiency, and moisture control in Cold Climates.

The ENERsign primus window achieves R-values of 13 depending on the glazing and wood type.

Large window fronts with a particularly modern design play a significant role in the architecture. As window manufacturer ENERsign has specialized in  developing energy-efficient and high-quality windows with the best values for energy-efficient construction.

Solving for climate change in the building sector requires higher levels of energy efficiency of all envelope components especially in cold climates to reduce heating demand.

A high efficiency house requires only a fraction of the primary energy compared to a standard state-of-the-art building.

There are a number of ways to build the future house energy-efficient. However, the key factors are the building envelope, the ventilation system and highly thermally insulated windows.

ENERsign Primus 



ENERsign Primus Profile Sectional Cut - R10

ENERsign Primus Profile Sectional Cut – R10


ENERsign Arctis 



ENERsign Arctis Profile Sectional Cut - R13

ENERsign Arctis Profile Sectional Cut – R13

WINS with ENERsign Windows

  • Energy-Efficient Building: Cost Savings by Reducing the number of Solar Panels Needed.
  • Net-Zero Building: Cost Savings by Reducing the number of Solar Panels needed to reach Net-Zero. Get a Plus-Energy Building at no additional Costs.
  • Off-the-Grid Buildings: With the same number of Solar Panels, more Energy available for other Systems than Heating. No Need for additional Energy Generation Systems.

Call Brian from ENERsign US Inc.

Phone: 720.217.6944

1301 Yellow Pine Ave., Unit C., Boulder, CO 80304

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)
Please add a product to configure it.