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Wooden Sliding Door Uw Values

The Uw value of a wooden sliding door describes the heat transfer coefficient of the entire construction, including the individual values of the frame and the glazing. windows24.com offers a large variety of windows, doors, as well as lift-and-slide systems featuring very favourable Uw values.

Classic IV 68

Uw-values profile Classic IV 68

Wood type spruce

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,1 1,2 1,2 1,2
1,0 1,1 1,2 1,1 1,1
0,7 1,1 Not possible in this system. Not possible in this system. Not possible in this system.
0,6 1,1 Not possible in this system. Not possible in this system. Not possible in this system.
Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Wood type pine, larch, meranti

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,2 1,3 1,2 1,2
1,0 1,2 1,2 1,2 1,2
0,7 1,2 Not possible in this system. Not possible in this system. Not possible in this system.
0,6 1,2 Not possible in this system. Not possible in this system. Not possible in this system.
Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Wood type oak and eucalyptus

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,5 1,4 1,3 1,3
1,0 1,5 1,3 1,2 1,2
0,7 1,5 Not possible in this system. Not possible in this system. Not possible in this system.
0,6 1,5 Not possible in this system. Not possible in this system. Not possible in this system.
Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Classic IV 68 - Profilschnitt

Classic IV 78

Uw values profile Classic IV 78

Wood type spruce

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,1 1,2 1,1 1,1
1,0 1,1 1,2 1,1 1,1
0,7 1,1 1,1 1,0 (0,99) 1,0 (0,98)
0,6 1,1 1,0 1,0 (0,96) 0,9 (0,94)
Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Wood type pine, larch, meranti

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,2 1,2 1,2 1,2
1,0 1,2 1,2 1,1 1,1
0,7 1,2 1,1 1,0 1,0
0,6 1,2 1,1 1,0 (0,99) 1,0 (0,97)
Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Wood type oak and eucalyptus

Ug glazing Uf frame Uw sliding door
Insulation glazing edge compound e.g. aluminium[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. TGI[W/m2K]
Uw sliding door
Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1 1,5 1,3 1,2 1,2
1,0 1,5 1,3 1,2 1,2
0,7 1,5 1,2 1,1 1,1
0,6 1,5 1,1 1,0 1,0
Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Classic IV 78 - Profilschnitt

  1. Reference size 3500 x 2180mm
  2. Calculated according to DIN EN 10077-2 : 2012-06 "Thermal performance of windows, doors and shutters - Calculation of the thermal transmittance".
  3. Values taken from data sheet of the "warm edge" working group

The issue of energy saving has never been as important as now since wasted energy is wasted money windows and sliding doors featuring large glass inserts allow light to enter the house, but they can also allow heat to escape. This is why thermal insulation is a very important factor with these building elements.

Heat transfer coefficient values describe the specific parameters of a component part; a wooden sliding door in this case. The parameters are defined by the thermal conductivity and thickness of the material. The lower the heat transfer coefficient, the better the thermal insulation properties.

The glazing plays a significant role in achieving the best possible Uw values for a wooden sliding door.

A double glazing helps to reduce energy loss through the window. In order to additionally improve thermal conductivity, it is possible to insert gas into the space between individual panes of the double glazing.

Due to its weak thermal transmittance, the gas infill decreases the rate of energy exchange between air and the glazing element, thus preventing thermal energy from escaping.


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