Chapter 11, Problem 52P

To determine

Find the heat-transfer rate through the window with $U=1.14\frac{\text{W}}{{\text{m}}^{\text{2}}\cdot \text{°C}}$.

Find the amount of energy saved if three windows with $U=4.5\frac{\text{W}}{{\text{m}}^{\text{2}}\cdot \text{°C}}$ are replaced with three windows with $U=1.14\frac{\text{W}}{{\text{m}}^{\text{2}}\cdot \text{°C}}$.