The thermal resistance R describes the ability of a multi-layered homogeneous component to oppose a heat flux with resistance, i.e. to slow down the heat transfer. The heat flux is considered on a reference area of 1 m² with a temperature difference of 1 Kelvin between the inner and outer surface of the component. The greater this thermal resistance R, the better the thermal insulation effect of the component. The resistance coefficient is the quotient of the thickness d and the thermal conductivity λ of the component.
R = d / λ
For multi-layer components, the individual resistance numbers add up:
R = d1 / λ1 + d2 / λ2 + dn / λn
Unit: (m²K)/W
Basis: DIN EN ISO 6946
Source: bauwion
