X-factor design

Unique visual appeal in simple shapes.

XPS insulation

Extruded polystyrene for high-load zones.

Underfloor insulation

Thermal resistance below living areas.

Xenon lighting (legacy)

Replaced by LED in Oktogreen.

X-joint sealing

Cross-connections between elements.

X-axis layout

Grid-based orientation in site design.

Utility room

Designated space for washing and storage.

User interface

pps or displays to manage building systems.

Urban heat island

Higher urban temperatures due to materials.

U-value

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