It provides an insulating barrier reducing the formation of interior condensation near the edge. The warm edge spacer allows for greater performance and increased energy efficiency, which is crucial during cold winter months (and summer heat). The wider the thermal break the better the window will insulate. Our windows are equipped to perform with large continuous thermal breaks ranging from 1 3/8” to 2 3/8” throughout the frame, compared to poorly insulated windows with only a ½” thermal break, if that.
Thermal insulation of a thermally broken aluminium Door/window is far better than non thermal aluminium Door/window. U-value of of non thermal aluminium Door/window frame is approx. 6.1 W/m2K. But in thermal break aluminium Door/window frame it is approximate 2 W/m2 K.
Does it matter ?
If we are using Double Glazed Glass , the performance of Door/window will be approx. 30 ~45% less in non thermal aluminium Door/window.
Let us check an example of a openable Door of size in width 3 ft ( 915 mm) & height 8 ft ( 2440 mm). Let us compare it with 3 kind of material- Non thermal aluminium Door, Thermal break aluminium Door & uPVC Door made up using Class “A” uPVC profile ( as per EN 12608).
Glass specification are as following 24 mm Double glazed glass – 6 mm toughened clear glass + 12 mm air ( or, argon filled gap) + 6 mm toughened clear glass- U value of glass is 2.8 W/m2 K.