Tool
U-value calculator.
Configure your glass build-up and instantly see the indicative Ug value — the lower, the better the insulation. The same calculation as in our configurator.
Number of panes
Coating
A low-E coating reflects heat back inside — the biggest difference in insulation.
Cavity gas fill
Cavity width
16 mm6 mm24 mm
A wider cavity insulates better up to ± 16 mm; beyond that the gain slightly decreases due to air movement in the cavity.
How does this compare?
Lower = better insulated. Your result sits between the references.
Single glass
5,80
Double glazing (old)
2,80
HR++
1,10
Your glass
1,09
Triple (HR+++)
0,60
Vacuum glass (BENGglas)
0,40
Better insulation? Upgrade options
This is how your insulation improves compared with your current choice (≈ 1,09 W/m²K). Lower Ug = less heat loss and lower heating costs.
Triple glazing (HR+++)
Three panes, two coatings — top insulation
≈ 0,61W/m²K
−0,48 lower Ug≈ 44% less heat loss
Configure triple →Vacuum glass (BENGglas)
The world's thinnest and best-insulating glass
≈ 0,40W/m²K
−0,69 lower Ug≈ 63% less heat loss
View vacuum glass →