Global Terms

Term	Term Definition	Options	Unit of Measure
Thermal Conductivity	A measure of a material's ability to conduct heat, defined as the amount of heat transferred per unit time, given a unit area of the material and a unit temperature gradient through the thickness of the material.	View	Btu/(hr-ft-F)
Thermal Zone Layout	Type of zoning used for space conditioning	View	None
Thickness	Dimension of the thickness of a component. Can be used to define overhang thickness, in addition to overhang depth and width.	View	ft
Tilt Angle	The angle from a horizontal surface; can be applied to an opaque surface, a fenestration unit, a solar panel, etc.	View	deg
Tilt Description	A descriptive value for tilt, when an exact numeric angle is not known.	View	None
U Factor	The U-factor, also known as thermal transmittance, is the overall heat transfer coefficient through a particular body or assembly, including its boundary films. Note that the U-factor for a construction assembly, including fenestration, includes the interior and exterior film coefficients (the boundary films referenced above). For characterization of fenestration products, the U-factor is calculated for the whole product, including the effect of the frame (center of glass, edge of glass, frame). The U-factor is the reciprocal of the R-value.	View	Btu/(hr-ft2-F)
Useful Life	The expected remaining service life of a component.	View	years
Value	Generic holder for numeric value characterized by atomic qualifiers	View	Unknown
Visible Absorptance	The fraction of incident visible wavelength radiation that is absorbed by the material or surface. Value range: 0-1	View	None
Volume	The space inside the boundary of a 3 dimensional shape	View	ft3
Warranty Duration	The time duration of a warranty for the component	View	months
Width	The dimension of an object from one side to the other. This can be used to define the width of any building component, such as the width of a photovoltaic panel or a window. In relation to length, width can be the dimension perpendicular to the length.	View	ft
Year of Manufacture	Year the product was produced and labeled by the manufacturer.	View	YYYY
Zoning System Type	Type of HVAC, Lighting, Sensor, or other zoning schemes	View	None

Global Terms

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