1) thermal conductance 2) heat conductance the heat transferred by conduction through a body in unit time, through unit area and for unit temperature difference across the body, or between the body under consideration GRM: n. (1,2) Note: a) when the hot face and the cold face are not equal in area, e.g. the internal and external surfaces of insulation on a box or pipe, it is necessary to state the position at which the area is measured; b) thermal conductance depends upon the actual thickness of the material or structure, whereas thermal conductivity refers to unit thickness of the material References: SEEcoefficient of thermal conductivity SEEheat conductivity SEEthermal conductivity SEEthermal conductibility