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.