A wall section has been constructed as shown in the drawing to the right. Assume that the interior temperature, $T_1,$ is $70F$ and that the outside temperature, $T_0,$ is $23F.$ The wall components are as shown below.

Required:

Find the weighted average overall coefficient of heat transfer, $U_{\text{e}\text{f}\text{f}},$ of this wall section due to the thermal bridging of the wood studs. Estimate the weighted value to two decimals. Estimate all $R-$values to two decimals.

Calculate the sensible heat loss $\{\begin{array}{c}B\end{array}$ tuh$\}$ through this ${10}^{\text{'}}$ high by ${42}^{\text{'}}$ long exterior wall. Watch the units.

$)=(UAT$ where $U=U-$factor, $A=$ wall area, $T=$ temperature