Installation Instructions

24 SABIC Innovative Plastics
Cold Radiation
The excellent insulation properties of Lexan
Thermoclear sheet will also contribute to a reduction in
the radiation of cold into the building.
The lower the U-value, the higher the inner sheet
surface temperature will be maintained during the
winter season.
Fig. 9 presents an example of the temperature prole
through 6 mm Lexan Thermoclear sheet when the
outside temperature is -10°C and the inside building
temperature is +20°C.
9. Temperature process
through Lexan Thermoclear
sheet at low outside
temperature.
10. Comparisation of Lexan
Thermoclear sheet with
single glazed glass under
the same conditions.
The multi-wall construction creates an air space which
results in a moderate sheet surface temperature.
Under the conditions indicated, the inner sheet surface
temperature remains far above zero so that there is no
cold radiation to the inside of the building.
Fig. 10 compares Lexan Thermoclear sheet with single
glazed glass under the same conditions. The inside glass
surface temperature is well below zero, which means
that cold radiation will negatively inuence the overall
building temperature and will affect the comfort level
near the windows.
Thermal Properties
9 10
+5,96°C
+20°C
-4,32°C
-10°C
thickness: 6 mm
U-value: 3,6 W/m
2
K
Inside Outside
0 1 2 3 4 5 6
Single glass 4mm Thermoclear 6mm Glazing inside surface temperature °c
Outside temperature: -10°C
Inside temperature: 20°C
-5
0
5
10
15
20
U-value W/m
2
K