A furnace wall has 0. 3 m-thick inner layer of fire-clay brick (k = 1. 7 W/ m K), a 0. 2 m-thick layer of kaolin brick (k = 0. 12 W/ m K), and a 0. 1 m-thick outer layer of face brick (k = 1. 3 W/m K). The furnace gases are at 1400 K, and the ambient air is at 310 K. The inside and outside heat transfer coefficients are 100 and 15 W/m2 K, respectively. Determine the heat loss through a 4 m-high, 8 m-long wall. It is later decided that the face brick outside temperature should not exceed 330 K. Can this constraint be met by increasing the thickness of the kaolin brick layer?