The thermal resistance for conduction of a plane wall is Temperature difference between the surfaces of the wall Amount of heat released per unit volume per unit time Temperature drop when a heat flux equal to 1W/m^2 passes through a wall Heat amount transferring per unit time through a unit surface of the wall

The thermal resistance for conduction of a plane wall is the temperature drop when a heat flux equal to passes through a wall. It is a measure of the wall's ability to resist heat flow and is defined as the ratio of the temperature difference across the wall to the heat flux passing through it.