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Uw values for windows and French doors made of plastic

The Uw values given below refer to the sample size. A single-leaf window with a width of 1230 mm and a height of 1480 mm is called the test size. All Uw values from German manufacturers are used when determining thiswindow size. As the window gets smaller, the Uw value goes down accordingly. For larger windows or French doors, the Uw value is generally better. Please note: If you would like your windows to receive funding from the KfW banking group, it is absolutely necessary for them to feature a warm edge spacer (a thermally separated edge seal).

Aluplast

Uw value profile IDEAL 4000

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.3 1.3 (1.33) 1.3 (1.26) 1.2 (1.24)
1.0 1.3 1.3 (1.26) 1.2 1.2 (1.18)
0.7 1.3 1.1 (1.05) 1.0 (0.99) 1.0 (0.97)
0.6 1.3 1.0 (0.98) 0.9 (0.92) 0.9 (0.90)
Table of Uw values for IDEAL 4000 profiles according to EN ISO 10077-1, see comments 1) 2) 3)

IDEAL 4000 - profile section

Uw value profile IDEAL 5000

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.2 1.3 (1.29) 1.2 (1.23) 1.2 (1.21)
1.0 1.2 1.2 (1.23) 1.2 (1.17) 1.1 (1.14)
0.7 1.2 1.0 (1.02) 1.0 (0.969) 0.9 (0.94)
0.6 1.2 0.9 (0.95) 0.9 (0.89) 0.9 (0.87)
Table of Uw values for IDEAL 5000 profiles according to EN ISO 10077-1, see comments 1) 2) 3)

IDEAL 5000 - profile section

Uw value profile IDEAL 7000

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.1 1.3 (1.26) 1.2 1.2 (1.18)
1.0 1.1 1.2 (1.19) 1.1 (1.13) 1.1 (1.11)
0.7 1.1 1.0 (0.99) 0.9 (0.92) 0.9
0.6 1.1 0.9 (0.92) 0.9 (0.86) 0.8 (0.84)
Table of Uw values for IDEAL 7000 profiles according to EN ISO 10077-1, see comments 1) 2) 3)

IDEAL 7000 - profile section

Uw value profile IDEAL 8000

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.0 1.2 (1.23) 1.2 (1.17) 1.2 (1.15)
1.0 1.0 1.2 (1.16) 1.1 1.1 (1.08)
0.7 1.0 1.0 (0.95) 0.9 (0.89) 0.9 (0.87)
0.6 1.0 0.9 (0.89) 0.8 (0.82) 0.8
Table of Uw values for IDEAL 8000 profiles according to EN ISO 10077-1, see comments 1) 2) 3)

IDEAL 8000 - profile section

Uw value profile energeto 8000

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.0 0.98 1.2 1.1 1.1
0.7 0.95 0,98 0.87 0.85
0.6 0.95 0.91 0.81 0.79
0.5 0.95 0.84 0.74 0.72
Table of Uw values for energeto 8000 profiles according to EN ISO 10077-1, see comments 1) 2) 3)

energeto 8000 - profile section

Uw value profile energeto 8000 ED

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.0 0.81 1.1 1.0 1.0
0.7 0.79 0.93 0.82 0.80
0.6 0.79 0.86 0.75 0.74
0.5 0.79 0.79 0.69 0.67
Table of Uw values for energeto 8000 ED profiles according to EN ISO 10077-1, see comments 1) 2) 3)

energeto 8000 ED - profile section

Kömmerling

Uw values – 70 AD

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.3 1.4 1.3 1.3
1.0 1.3 1.3 1.2 1.2
0.7 1.3 1.1 1.0 (0.99) 1.0 (0.96)
0.6 1.3 1.0 (1.02) 0.9 (0.92) 0.9
Table of Uw values for 70 AD profiles according to EN ISO 10077-1, see comments 1) 2) 3)

70 AD - Profile section

Uw-values – 76 AD

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.2 1.3 1.2 1.2
1.0 1.2 1.3 1.2 1.1
0.7 1.2 1.1 1.0 (0.95) 0.9 (0.94)
0.6 1.2 1.0 (0.99) 0.9 (0.88) 0.9 (0.87)
Table of Uw values for 76 AD profiles according to EN ISO 10077-1, see comments 1) 2) 3)

76 AD - Profile section

Uw-values – 76 MD

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1 1.1 1.3 1.2 1.2
1.0 1.1 1.2 1.1 1.1
0.7 1.1 1.0 0.9 (0.92) 0.9 (0.91)
0.6 1.1 1.0 (0.96) 0.9 (0.85) 0.8 (0.84)
Table of Uw values for 76 MD profiles according to EN ISO 10077-1, see comments 1) 2) 3)

 76 MD - profile section

Uw-values – 88 MD

Glass Ug value W/(m²k) Frame Uf value W/(m²k) Window Uw value insulating glass edge seal aluminium W/(m²k) Window Uw value insulating glass edge seal KSD W/(m²k) Window Uw value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1,1 0,95 1,2 1,2 1,1
1,0 0,95 1,2 1,1 1,1
0,7 0,95 1,0 (0,98) 0,9 (0,87) 0,9 (0,86)
0,6 0,95 0,9 (0,91) 0,8 (0,81) 0,8 (0,79)
Table of Uw values for 88 MD profiles according to EN ISO 10077-1, see comments 1) 2) 3)

88 MD - Profile section

  1. Windows with a glazing heat transfer coefficient of Ug < 1.9 W/m²K may be specified using the standard dimensions of 1.23 m x 1.48 m.
  2. According to EN ISO 10077, Uw values < 1.0 W/m²K are shown with 2 decimal points.
  3. The Uw values given in brackets are not rounded and are for information purposes only.

How is the Uw value calculated for a uPVC window?

The heat transfer coefficient of a window made of plastic determines whether a window can be classified as suitable for passive houses and whether it can be subsidised by the KfW banking group. Energy savings not only protect the environment, they also make an immediate difference on your energy bill.

The difference between a Uw value of 3.5 and a value of 0.83 can make a difference of more than 1000 litres of heating oil per year for an area of 30 m².

With a window made of plastic, the Uw values are calculated based on the individual U values of the window frame and glazing, as well as the heat loss at the edge of the glass. For the sake of comparison, a standard window size of 1230 x 1480 mm is usually used for the calculation, but it can generally be assumed that a larger window will result in a lower value.

A thermally separated edge seal along the insulating glass - the so-called "warm edge" - further improves the thermal insulation of the entire door.

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(6 ratings , Ø 4.7)
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