Heat insulation of PVC windows

Heat insulation of PVC windows

Stars by QFORT

We care about the comfort and value of your home, and we closely follow these aspects when designing our PVC windows.

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Heat-insulation coefficient values of Stars by QFORT windows:

Please find below the heat-insulation coefficient values relevant for QFORT heat-insulation windows.

The Ug coefficient represents the heat transfer value calculated at the level of the window glazing.

The Uw coefficient represents the heat transfer value calculated for the entire window.

The smaller the U coefficient, the lower the heat loss and the better the heat insulation of that building element.

7 Stars
Standard equipment SuperLowE Insulating Glass
Ug ≥ 1,0 W/m²K |
Double glazing Uw ≥ 1,09 W/m²K
Ug ≥ 0,5 W/m²K |
Triple glazing Uw ≥ 0,74 W/m²K
Heat insulation of PVC windows 6stars
Standard equipment SuperLowE Insulating Glass
Ug ≥ 1,0 W/m²K |
Double glazing Uw ≥ 1,10 W/m²K
Ug ≥ 0,5 W/m²K |
Triple glazing Uw ≥ 0,76 W/m²K
5 Stars
Standard equipment SuperLowE Insulating Glass
Ug ≥ 1,0 W/m²K |
Double glazing Uw ≥ 1,19 W/m²K
Ug ≥ 0,7 W/m²K |
Triple glazing Uw ≥ 0,99 W/m²K
Heat insulation of PVC windows 4stars
Standard equipment SuperLowE Insulating Glass
Ug ≥ 1,0 W/m²K |
Double glazing Uw ≥ 1,20 W/m²K
Ug ≥ 0,7 W/m²K |
Triple glazing Uw ≥ 1,00 W/m²K
* The Uw value is calculated for a standard 1230 mm × 1480 mm window with a surface area of 1.82 m² and a warm spacer.

Energy Saving with Stars by QFORT Windows

The graph below clearly shows the advantages of both comfort and energy savings obtained, depending on the type of glass of the chosen windows.

The U coefficient represents the heat transfer value of a building element (wall, window, door, etc.) and shows how well that specific building element conducts heat.

Smaller U coefficient = Lower heat loss

Outdoor temperature
- 10°C
Heat insulation
Pane/Glass surface temperature in the dwelling

Simple 4mm window pane
U ≥ 5,8 W/m2K / -2,3°C

Traditional double-glazed window
U ≥ 2,9 W/m²K / 9°C

24mm heat-insulating double pane
U ≥ 1,0 W/m²K / 15,6°C

44mm heat insulating triple pane
U ≥ 0,5 W/m²K / 18,5°C

Indoor temperature
+20°C
Heat insulation
Energy
savings

0%

up to 39%

up to 73%

up to 87%

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QFORT Services - Warranty

*The warranty period may vary depending on the components and specifications of the product. Please refer to the warranty certificate for more details.