Definition of Thermal resistance

Definition of Thermal resistance - wordIQ Dictionary and Encyclopedia
Thermal resistance is the temperature difference across a unit area of a material of unit thickness when a unit of heat energy flows through it in unit time. It is the reciprocal of thermal conductance. The units of thermal resistance are, in the SI system, K.m²/W. In the building trade in the USA, the traditional non-metric R-value is sometimes used instead, with units ft² °F.h/Btu.