BAS EN ISO 12241:2007

Fundamental formulae and methods typically used in the practical calculation of steady-state, one dimensional industrial heat flow variables; also included are simplified calculation methods for some variables. These methods can be applied to most types of industrial thermal insulation heat transfer problems. Do not take account permeation of air or transmittance of thermal radiation through transparent media, either in respect to surface of calculation or to surrounding surfaces. Mathematical formulae in these methods require for their solution that some system variables be known, given assumed, or measured.