Estimating U-values of stick system curtain walls – Appendix
A.
Appendix A of the document allows building designers to
estimate the U-value of a stick system curtain wall at an early stage
in the building design.
The U-value of a stick curtain wall depends on:
• Proportion of the wall that is glazed;
• Mullion spacing;
• Number
of opening lights;
• The U-values of separate components;
• Heat transfer between components.
A series of curves have been developed that allow a quick
way of estimating U-values. They are based on a mullion spacing
with corrections to allow for opening lights, additional opaque zones,
and panel U-values.
