Xenon lighting (legacy)

Replaced by LED in Oktogreen.

X-joint sealing

Cross-connections between elements.

X-factor design

Unique visual appeal in simple shapes.

X-axis layout

Grid-based orientation in site design.

XPS insulation

Extruded polystyrene for high-load zones.

User interface

pps or displays to manage building systems.

Utility room

Designated space for washing and storage.

Underfloor insulation

Thermal resistance below living areas.

Urban heat island

Higher urban temperatures due to materials.

U-value

Measure of heat flow through a material; lower = better.