Optimal thermal insulation by windows: standards, tips, solutions

Windows can make an important contribution to thermal insulation and help save energy and heating costs. To ensure this, windows must have technically mature insulation properties.
For optimal thermal insulation, the profile and glazing of the windows depend. Another important factor is the installation of the windows into the wall.

Standards for windows for thermal insulation

Thermal insulation is one of the most important characteristic values ​​for windows. The U-value provides information about the thermal insulation quality of windows and is the heat transfer coefficient. The lower the U-value is the better. A low U-value is an indication of low heat loss.

Windows with a low U-value help to save energy costs.

The unit of measurement for the U-value is watt per square meter and Kelvin (W/m²K).

In windows, three different U-values ​​are differentiated:

• UG value for window glass: The UG value becomes lower the thicker the glass package. The window should consist of multiple glazing. In addition, insulation with a low-e layer and a noble gas filling of the intermediate space contribute to a lower value.
• UF value for the window frame: The UF value becomes lower if the material of the window frame has a high density or a pronounced chamber system.
• UW value as a window insulation value: The UW value is the heat transfer coefficient for the entire window and should be as low as possible. For energy-saving windows, the UW value should be less than 0.9 W/(m²K).

Another important parameter for thermal insulation for windows is the total degree of energy, the G-value. A G-value of 1 means that the energy defamation is 100 percent. With a G-value of 0, no energy gets through the windows at all.

The G-value depends on the type of glazing:

• Simple glazing: 0.75 to 0.87
• Two-glazing: 0.65 to 0.70
• Triple glazing: 0.52 to 0.65
• 3 disc heat protection glazing: 0.38 to 0.55
• Sun protection glazing: 0.25 to 0.50

The G-value should be adapted to the energy balance of a building. It should be as low as possible in northern windows, while a higher G-value is recommended on the south side to take advantage of solar energy.

Tips for thermal insulation by windows

Optimal thermal insulation begins with the installation of the windows into the wall. Ideally, the windows should be transferred in front of the outer wall into the insulation level. If this is not possible, the insulation should be inserted into the window library. Thermal bridges can be avoided if the insulation covers the window frame. An airtight wall connection can be produced with joint control tape or connection tapes.

The Schüco windows are available in many variants and ensure a high level of energy comfort. They are suitable for new buildings as well as for energetic renovation. The profile is an important factor for good insulation. Multi -chamber profiles consist of several chambers filled with air. The Schüco windows have a five-chamber construction. They are available in PVC and aluminum. The Schüco windows with intelligent systems such as automatic ventilation and sun protection control are also available.

Another important aspect for optimal thermal insulation is glazing, with its important components, a warm edge and the nature of the glass surfaces.

The warm edge is an energy-efficient spacer between the individual window panes with a double or triple glazing. With the warm knew the noble gas filling cannot escape from the intermediate disc rooms.

The glass surface contributes to heat protection. A special coating is required to offer summer heat protection. It ensures that only a small part of the solar energy gets into the building and air conditioning is not required. Depending on the sun's ray, the nature of the surface can be individually adjusted. Windows are available with different coatings.

Proper ventilation for heat -insulated windows

New windows close tightly and offer good insulation. However, there is sufficient ventilation to avoid mold formation. With insulated outer walls, the mold risk can be reduced to almost zero. A hygrometer serves to control the air humidity in the apartment or in offices. The most efficient shape of the ventilation is to ventilate. If this is not possible, shock ventilation should be done. Tipping ventilation is not efficient enough.

A ventilation system is not always necessary.

To save energy and ventilate efficiently, window folding fans are suitable. They contribute to improving air quality. Window fold fans are small components in the window frame that ensure permanent air exchange. However, window fold fans are not a complete replacement for correct ventilation.

Suitable solutions for thermal insulation with windows

There are different solutions for optimal thermal insulation with windows. Windows are available in many sizes and versions and can be selected to match the house. They are available with low UF values ​​from 1.3 W/M2K. Spacious window fronts can ensure good thermal insulation as well as individual smaller windows.

Which G-value is chosen depends on the one hand on the type of glazing, on the other hand on the location of the house and the desired use of solar energy.

In addition to good thermal insulation, good sound insulation and burglary protection also depend on. In addition to thermal insulation, glazing offers good sound insulation. For break -in protection, it depends on frosted glazing and a strong profile.

The windows can be combined with the suitable front doors, which also offer good thermal insulation. The doors also have multi -chamber profiles and can be chosen with glazing.