h position is the radiative conductance coefficient for the surface of the considered layer and the fluid next to the layer, position = out indicates the coefficient at the outermost layer, position = in indicates the coefficient at the innermost layer,
position = gap,i indicates the coefficient for the gap between the layer i and i + 1 and position = across, i indicated the
coefficient for the gap between the layer i (for the inner glass layer which is located next to the effective layer (i = n 1)) and layer i + 2