A thermo pane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm thick. The window separates room air at 20°C from outside ambient air at - 10°C. The convection coefficient associated with the inner (room-side) surface is 10 W/m² ∙ K.

(a) If the convection coefficient associated with the outer (ambient) air is ho = 80 W/m² ∙ K, what is the heat loss through a window that is 0.8 m long by 0.5 m wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant.

(b) Compute and plot the effect of h_o on the heat loss for 10 < h_o < 100 W/m² ∙ K. Repeat this calculation for a triple-pane construction in which a third pane and a second air space of equivalent thickness are added.