A composite wall consists of a 13mm thick inner plaster board, a 192 mm thick fiberglass blanket insulation and a 20 mm thick high density particle board exterior panel. The thermal conductivity of the insulation is 0.35 W/m K. Estimate the heat flux through the wall for following conditions: heat transfer coefficients in the inside and outside as 10 and 65 W/m2 K respectively; inside and outside temperatures are 20oC and 0oC respectively.